高中英语名词性从句（高中英语名词性从句和定语从句的语法总结（详细一点））

本文目录

• 高中英语名词性从句和定语从句的语法总结（详细一点）
• 高中英语语法 的名词性从句
• 高中英语基础语法知识：名词性从句
• 高考英语语法:高中英语语法-名词性从句
• 高中英语语法——从句共有几种类型请分别给出详细讲解
• 高中英语名词性从句总结 谢谢
• 介绍高中英语语法句子举例
• 高中英语语法名词性从句考点
• 关于高中英语语法名词性从句的几个题目

高中英语名词性从句和定语从句的语法总结（详细一点）

名词性从句是由if, whether, that 和各种疑问词充当连接词所引导的从句，其功同名词一样。一．主语从句 主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。 1. It 作形式主语和it引导强调句的比较 It 作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。而it引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that。被强调部分指人是也可用who/whom。2. 用it 作形式主语的结构 (1) It is ＋名词＋从句 (2) it is ＋形容词＋从句 (3) it is ＋不及物动词＋从句 (4) it ＋过去分词＋从句 3. 主语从句不可位于句首的五种情况 (1) if 引导的主语从句不可居于复合句句首。 (2) It is said , (reported) …结构中的主语从句不可提前。 (3) It happens…, It occurs… 结构中的主语从句不可提前。 (4) It doesn’t matter how/whether …结构中的主语从句不可提前。 (5) 含主语从句的复合句是疑问句时，主语从句不可提前。 4. What 与that 在引导主语从句时的区别 What 引导主语从句时在句时在从句中充当句子成分，如主语．宾语．表语，而that 则不然。 定语从句也称为关系从句或形容词性从句，由关系代词（who, whom, whose, which, that）或关系副词（as, when, where, why）等引导。关系词除了起引导作用外，还在从句中指代前面的先行词，并在从句中担任一定的成分。 一、限定性定语从句和非限定性定语从句定语从句就其与先行词的关系而言，可分为限定性定语从句和非限定性定语从句。限定性定语从句和先行词之间没有逗号，表示对先行词起修饰限制作用；而非限定性定语从句和先行词之间有逗号分开，是对先行词进行补充说明，相当于并列句。如：He is the man who has strong personality. 他是个个性很强的人。（限定性定语从句）My brother, who works abroad, is coming next week. 我哥哥在国外工作，他下周将回来。（非限定性定语从句）注：1. 非限定性定语从句不能用that来引导，一般用which，as或who（指人）。用which或as引导时，既可以修饰主句的部分内容，也可修饰主句的全部内容。如：He spoke confidently, which impressed me most. （which指代整个主句，在从句中作主语）2. as引导的非限定性定语从句既可以放在主句之前，也可以放在主句之后，但which或who引导的非限定性定语从句不能放在主句之前。如：　　As we all know, the moon is a satellite of the earth.　　The large area is covered with thick snow, which affects people’s life greatly. 3. 在限定性定语从句中，关系代词作宾语时可以省略；但在非限定性定语从句中，关系代词作宾语时不能省略。如：The film (which) I saw last night is about a young teacher. (which可以省去)She introduced me to her husband, whom I hadn’t met before. (whom不能省去)二、通常只用关系代词that，不用 which，who或whom的几种情况1. 当先行词是all, everything, nothing, something, anything, little, much, none, few等时。如：All that you want are here.2. 当先行词被all, no, some, any, every, a few, a little, much, only, very等修饰时。如：There is no person that doesn’t make mistakes. 3. 当先行词被序数词或形容词最高级修饰时。如：This is the best film that I have ever seen.4. 当出现两个或两个以上的先行词，并同时兼指人和物时。如：　We are talking about the people and countries that we have visited.5. 当主句是以which 或 who 开头的特殊疑问句时。如：　Who is the person that is standing over there?6. 当定语从句为there be 句型时，关系代词只能用that，但经常可以省略。如： 　I know the difference (that) there is between you.7. 当关系代词在从句中作表语时，常用that。如： He does not seem to be the man that he was. 他似乎和过去不一样了。 三、as 与其他词连用引导的定语从句as 引导定语从句时，可指人也可指物，通常与the same，such，so等连用，形式为：the same… as，such… as，as …as，so… as。As在定语从句中可作主语、宾语、表语等。如：She knew he felt just the same as she did. 她知道他的感觉与她自己的一样。(as代替事，作宾语)I lend you such books as will interest you. 我借给你使你感兴趣的书。(as代替物，作主语)注：the same… as 和the same… that的用法不同。as引导的定语从句表示其内容与主句所讲的事物“相似”，指同类事物；that引导的定语从句表示其内容与主句所讲的事物是“同一个”，指同一事物。如：This is the same pen as I lost yesterday. 这和我昨天丢的笔一样。（类似的笔）This is the same pen that I lost yesterday. 这支笔就是我昨天丢的那支。（同一支笔） 四、“介词+关系代词”引导的定语从句在“介词+which/whom”结构中，介词的选择取决于三种情况：1．定语从句中谓语动词或表语的搭配。如： This is the college in which I am studying. He is the man about whom we are talking.2．先行词与介词的习惯搭配。如： The speed at which the machine operates is shown on the meter. 仪表上显示出这台机器运转的速度。3．当定语从句为最高级时只能用of which; 否则用其他介词。如：　 I have five dictionaries of which Longman Dictionary is the best. 　I have five dictionaries among which Longman Dictionary is published in UK. 注：不可拆分的动词短语介词不能提前，如put up with；有的短语可能有不同的介词搭配，此时需要根据上下文来确定。如：be familiar with/to，compare with/to等。有时为表意清楚，还可以在关系副词where/ when前加介词from, to等。如： China is the birthplace of kites, from where kite flying spread to Japan, Korea, Thailand and India. 中国是风筝的故乡，从这里，放风筝的运动传到了日本、韩国、泰国和印度。

高中英语语法 的名词性从句

名词性从句名词性从句就是在句子中充当名词功能的以相关从属连词引导的从句，包括主语从句、宾语从句、表语从句和同位语从句四种。1．主语从句：以连词 that what whom whose what which whoever whatever whichever where when how why 引导，在句子中充当主语。例：What she said is not yet known. How this happened is not clear to anyone.Whoever comes is welcome.That she will do well is her exam is certain.（It is certain that she will do well in her exam.）注：it 为形式主语，2．宾语从句：以连词 that who whom whose what 等引导，在句子中充当宾语。例：He told us that he felt ill.Everybody knows what happened.I doubt whether he will succeed.I wonder what he is writing about.3．表语从句：以 that whether who whom whoever when where when 等引导，在句子中充当表语。例：The trouble is that I lost his address.The question is whether they will be able to help us.That was what she did this morning.This is why we puts off the sports meeting.4．同位语从句：同位语从句有自己的先行词，它跟定语从句很相似，先行词包含从句中所含内容，从句不起修饰作用。我们将在学习定语从句时，在加以详细比较，多用在连词what 引导。（不用which，此外还可用whether who where 等也可以引导。在这章中我们着重学习that whether 引导的同位语从句，引导同位语从句的先行词常用的有：fact news idea whether reply promise truth report remark 等。例：I heard the news that the Chinese football team defeated the Japanese team last night. I have no idea whether he will come or not. They were all much worried over the fact that you were sick.关于名词性从句的学习主要是我们应在学习中加以练习，在练习中反复学习，在多次重复学习和练习中加以掌握。

高中英语基础语法知识：名词性从句

高中英语基础语法知识：名词性从句

　　一、名词性从句的基本概念

　　在复合句中起名词作用的从句叫名词性从句，包括作主语从句、表语从句、宾语从句和同位语从句。

　　(1)主语从句

　　就是在复合句中作主语的从句。主语从句常用that, whether, who, whom, whose, what, which, when, where, how, why, whatever, whoever等引导。如：

　　Whether he will be able to come remains a question. 他是否来还是问题。

　　That China is a great socialist country is well known. 众所周知，中国是一个伟大的社会主义国家。

　　注：为避免头重脚轻，使句子平衡，常用it作形式主语，而将主语从句后置。如上述第二例常说成：

　　It is well known that China is a great socialist country.

　　但是，由连接代词what, whatever, whoever等引导的主语从句一般不能用形式主语。如：

　　What he found surprised me greatly. 他的发现使我非常吃惊。

　　Whoever is finished may rest. 凡是做完工的人都可以休息。

　　(2)表语从句

　　就是在连系动词之后作表语的从句。引导表语从句的连接除与引导主语从句的连接词外，还有as if， as though。如：

　　The question is whether he is able to do it alone. 问题是他能否单独做这件事。

　　It looks as if (though) it is going to snow. 天好像要下雪似的。

　　注意：要区分以下句式：

　　1. that’s why+结果;that’s because+原因。2. the reason why /for…is that…

　　He is absent. That’s because he is ill. 他缺席，这是因为他生病了。

　　He is ill. That’s why he is absent. 他病了，这就是他缺席的原因。

　　The reason why he is absent is that he is ill. 他缺席的.原因是他生病了。

　　(3)宾语从句

　　就是在复合句中作宾语的从句。引导这宾语从句的连接词与引导主语从句的连接词基本相同。如：

　　They didn’t say which they wanted. 他们没有说他们想要哪一个。

　　I am sure (that) no harm will ever come to you. 我肯定你永远不会受伤害。

　　I was surprised at what has happened.我对发生的事感到惊讶。

　　注意：当think, believe, suppose等的疑问式后面跟连接代词或连接副词引导的宾语从句时，习惯上将这些连接词置于句首，即“连接代/副词+do you think /believe /expect+宾语从句的其余部分?”如：

　　Who do you think is the best player this year? 你认为今年谁是最佳运动员?

　　What do you suppose you will do after school? 你想放学后干什么?

　　(4)同位语从句

　　就是在句中作同位语的从句。它通常有放在thought, idea, news, word(=news), plan, doubt, question, fact, suggestion, belief等抽象名词的后面，说明这些词的具体内容或含义。同位语从句大多由that引导，也可由whether, how, when, where, why等引导，但不能由which引导。如：

　　The idea that the earth is round is not a new one. “地球是圆的”这种观点并不新鲜。

　　He must answer the question whether he agrees to it or not. 他必须回答他是否同意此事这们一问题。

　　I have no idea when he will set out. 我不知他什么时候出发。

　　注：有时，同位语从句并不紧跟在它所说明的词的后面。如：

　　The whole truth came out at last that he was a wolf in sheep’s clothing. 真相终于大白了，他原来是一只披羊皮的狼。

高考英语语法:高中英语语法-名词性从句

***隐藏网址*** 名词性从句 名词性从句相当于名词,可分别作主句的主语、表语、宾语和同位语。因此,名词性从句厅分为主语从句、表语从句、宾语从句和同位从句。 (一)引导名词性从句的连接词 1、连接代词:who, whose, whom, what, which。有词义,在从句中担任成分,如主语、表语、宾语、或定语等。 2、连接副词:when, where, why, how。有词义,在从句中担任成分,作状语。 3、连接词:that, whether, if, as if。that 无词义,在从句中不担任成分,有时可省略;if (whether), as if虽有词义,但在从句中不担任成分。 注意:连接代词与连接副词在句中不再是疑问句,因而从句中谓语不用疑问式。连接代词与连接副词在从句充当句子成分,连接词whether 和if(是否),as if(好象)在从句中不充当句子成分,只起连接作用。根据句义,如果连接代词与连接副词,whether、if 和as if都用不上时,才用that作连接词(that本身无任何含义)。 (二)主语从句 1、主语从句在复合句作主语。 e.g. Who will go is not important. 2、用it作形式主语,主语从句放在句末。 e.g. It doesn’t matter so much whether you will come or not. 3、that引导主语从句时,不能省略。 e.g. That he suddenly fell ill last week made us surprised. (三)表语从句 1、表语从句在复合句中作表语,位于系动词之后。 e.g. The question was who could go there. 2、引导表语从句的连接词that有时可省去。 e.g. My idea is (that) we can get more comrades to help in the work. (四)宾语从句 1、宾语从句在复合句中作宾语。引导宾语从句的连词that一般可省略。 e.g. I hope (that) everything is all right. 2、介词之后的宾语从句,不可用which或if连接,要分别用what或 whether。 e.g. I’m interested in whether you’ve finished the work.. I’m interested in what you’ve said. 3、whether与if都可以引导宾语从句,常可互换。但下面情况不能互换。 ①宾语从句是否定句时,只用if,不用whether。 e.g. I wonder if it doesn’t rain. ②用if 会引起误解,就要用whether。 e.g. Please let me know whether you want to go.(此句如果把whether改成if,容易当成条件句理解) ③宾语从句中的whether 与or not直接连用,就不能换成if;不直接连用,可换。 e.g. I don’t know whether or not the report is true. I don’t know whether/ if the report is true or not. ④介词后的宾语从句要用whether引导。whether 可与不定式连用。whether也可引导主语从句、表语从句、同位语从句,还可引导让步状语从句,以上均不能换成if。但引导条件从句时,只能用if,而不能用whether。 e.g. It depends on whether we have enough time. They don’t know whether to go there. Please come to see me if you have time. (五)同位语从句 同位语从句在句中作某一名词的同位语,一般位于该名词(如:news, fact, idea, suggestion, promise等)之后,说明该名词的具体内容。 e.g. I have no idea when he will be back. The fact that he had not said anything surprised everybody. 练习:名词性从句 一、判断下列各句哪句含有名词性从句,并指出是什么从句: 1. China is no longer what it used to be. 2. The truth that the earth turn around the sun is known to all. 3. It was snowing when he arrived at the station. 4. How he persuaded the manager to change the plan is interesting to us all. 5. The news that they had won the game soon spread over the whole school. 6. The news that you told me yesterday was really disappointing. 7. That is where Lu Xun used to live. 8. He spoke as if he understood what he was talking about. 9. Do you remember the teacher who taught us English at middle school? 10. I wonder why she refused my invitation. 二、用适当的连词填空: 1. I can’t decide ____________ dictionary I should buy. 2. That’s ____________ he refused my invitation. 3. I am very interested in ____________ he has improved his pronunciation in such a short time. 4. ____________ we need is more time. 5. The fact ____________ she had not said anything at the meeting surprised everybody. 6. ____________ and ____________ they will meet has not been decided yet. 7. Please tell me ____________ you are waiting for. 8. Is that ____________ you are looking for? 9. Would you please tell me ____________ the nearest post office is? 10. I don’t know ____________ he will agree to the plan or not. 三、选择填空: 1. Do you see _____ I mean? A. that B./ C. how D. what 2. Tell me_____ is on your mind. A. that B. what C. which D. why 3. We must stick to _____ we have agreed on. A. what B. that C. / D. how 4. Let me see _____. A. that can I repair the radio B. whether -I can repair the radio C. I can repair the radio D. whether can I repair the radio 5. Keep in mind _____. A. that the teacher said B. what did the teacher say C. that did the teacher say D. what the teacher said 6. Could you advise me _____? A. which book should I read first B. what book should I read first C. that book 1 should read first D. which book I should read first 7. He was criticized for _____. A. he had done it B. what he had done C. what had he done D. that he had done it 8. Would you kindly tell me _____? A. how can I get to the Beijing Railway Station B. how I can get to the Beijing Railway Station C. where can I get to the Beijing Railway Station D. whether can I get to the Beijing Railway Station 9. Mrs. Smith was very much impressed by _____. A. what had she seen in China B. that she had seen in China C. what she had seen in China D. which had she seen in China 10. We took it for granted ___ A. that they were not coming B. that were they not coming C. they were coming not D. were they not coining 11. I really don’t know _____ A. I should do next B. what should I do next C. what I should do next D. how I should do next 12. I’m afraid _____. A. the little girl will have to be operated on B. that will the little girl have to operate on C. the little girl will have to operate on D. that will the little girl have to be operated on 13. She walked up to _____ . A. where did I stand B. where I stood C. I stood there D. where I stood there 14. Can you tell me _____? A. who is that gentleman B. that gentleman is who C. who that gentleman is D. whom .is that gentleman 15. We’ll give you _____. A. that do you need B. what do you need C. whatever you need D. whether do you need 16. They want us to know _____ to help us. A. what can they B. what they can C. how they can D. how can they 17. We must put _____ into practice. A. what we have learned B. that we have learned C. that have we learned D. what have we learned 18. Did she say anything about _____? A. that the work was to be done B. how was the work to be done C. that was the work to be done D. how the work was to be done 19. He was never satisfied with _____. A. what she had achieved B. had what she achieved C. she had achieved D. that she achieved 20. These photographs will show you _____. A. what does our village look like B. what our village looks like C. how does our village look like D. how our village looks like 21. Peter insisted _____ he pay the bill. A. on that B. what C. that D. on which 22. They urged _____ the library open during the vacation. A. when B. where C. why D. that 23. We wish we could have learned _____ when we were at high school. A. what you did B. that you had done C. that what you did D. what did you do 24.1 will describe to you _____ I saw when there. A. what B. that C. which D./ 25. From _____ I should say he is a good worker. A. what 1 know of him B. that I do know of him C. what do I know of him D. that do I know of him 26. I will give this dictionary to __ wants to have it. A. whomever B. anyone C. whoever D. someone 27._____ they will come here hasn’ t been decided yet. A. What B. That C. When D. Where 28. _____ was said here must be kept secret. A. Who B. The thing C. Whatever D. Where 29. It is still a question _____ we shall have our sports meet. A. if B. that C. what D. when 30. I’m going anyway. _____ she will go is up to her to decide. A. If or not B. Whether or not C. If D. That 31. It is strange _____ she have left without saying a word. A. that B. what C. why D. how 32. It is very clear _____ our policy is a correct one. A. what B. that C. why D. where 33. _____ Mr Zhang said is quite right. A. That B. When C. What D. Whether 34. It has been decided _____ he will be sent there. A. if B. whether C. why D. that 35. It doesn’ t matter _____he’ s come back or not. A. if B. whether C. that D. when 36. It’s a great pity _____ we won’t be able to finish the task on time. A. when B. that C. why D. where 37. It happened _____ I wasn’t there that day. A. when B. why C. where D. that 38._____ you have done might do harm to other people. A. What B. That C. Which D. The things 39. _____ leaves the room last ought to turn oft the lights. A. Anyone B. The person C. Whoever D.Who 40._____ the 2000 Olympic Games won’t be held in Beijing is known to all. A. Whether B. If C. Whenever D. That 41. _____ fails to see this will make a big mistake. A. That B. Whoever C. Whether D. Whether or not 42. __ we need more equipment is quite obvious. A. What B. Whether C. That D. Whatever 43. Has it been announced _____? A. when are the planes to take off B. that are the planes to take off C. where are the planes to take off D. when the planes are to take off 44. That is _____ we all support his idea. A. what B. why C. where D. when 45. That’s _____ we should do. A. that B. what C. how D. why 46. _____ is troubling me is _____ I don’t understand _____ he said A. What; that; what B. What; what; what C. That; that; what D. Why; that; which 47. Things were not _____ they seemed to be. A. when B. why C. that D. what 48. That’s _____ I want to say. A. all what B. what C. all which D. what that 49. That’s _____ . A. where our differences lie B. our differences lie there C. where do our differences lie D. that where our differences lie 50. That is _____ . A. where lived he there B. where did he live C. where he lived D. that where he lived 51. The questions is _____. A. whether is it worth doing B. that if it is worth doing C. whether it is worth doing D. if it is worth doing 52. Water will continue to be _____ it is today next in importance to oxygen. A. how B. which C. what D. as 53. That’s_____. A. how did I become a teacher B. how I became a teacher C. how a teacher I became D. that I became a teacher 54. They are just _____. A. that what shall I have B. what shall I have C. that I shall have what D. what I shall have 55. It looked ____. A. as if it was going to rain B. that as if it was going to rain C. as if was it going to rain D. as if that it was going to rain 56. That’s_____. A. how she did it B. that how did she do it. C. how did she do it D. what she did it 57. That is _____ we decided to put the discussion off. A. where B. which C. that D. why 58. That’s _____ I lived when I was ten years old. A. where B. at which C. there where D. when 59. My suggestion is _____ we should send a few comrades to help them. A. if B. that C. when that D. that where 60. The idea _____ all people are selfish is wrong. A. what B. that C. why D. if 61. We heard the news _____ our team had won. A. that B. what C. whether D. why 62. The fact _____ he hadn’t said anything surprised us all. A. why B. if C. that D. whether 63.I have no idea _____ she will be back. A. that B. where C. that when D. when 64. We must keep in mind the fact _____ China is still a developing country. A. whether B. that C. why D. when 65. They have no idea at all _____. A. where he has gone B. where did he go ***隐藏网址***

高中英语语法——从句共有几种类型请分别给出详细讲解

主语从句（一般句首，it作形式主语），表语从句（系动词后），宾语从句（介词动词后，it作形式宾语）同位语从句（idea，suggestion，promise等特殊词后，解释说明）-------名词性从句定语从句（名词代词后thatwhichwhowhose连接）非限制性定语从句不能用that状语从句指句子用作状语时，起副词作用的句子。它可以修饰谓语、非谓语动词、定语、状语或整个句子。根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句。状语从句一般由连词(从属连词)引导，也可以由词组引起。从句位于句首或句中时通常用逗号与主句隔开，位于句尾时可以不用逗号隔开。

高中英语名词性从句总结 谢谢

名词性从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词性从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。一、引导名词性从句的连接词分类引导名词性从句的连接词可分为三类： 连词（5个）：that （宾语从句或表语从句中that有时可以省略） whether,if （均表示“是否”表明从句内容的不确定性） as if ,as though （均表示“好像”，“似乎”） 以上在从句中均不充当任何成分 连接代词（9个）：what, whatever, who, whoever, whom, whomever, whose, which, whichever 连接副词（7个）：when, where, how, why, whenever, wherever, however 不可省略的连词： 1. 介词后的连词 2. 引导主语从句和同位语从句的连词不可省略。 That she was chosen made us very happy. We heard the news that our team had won. 比较whether与if 均为"是否"的意思。 但在下列情况下，只可用whether： 1. whether引导主语从句并在句首 2. 引导表语从句 3. whether从句作介词宾语 4. 常与 "or not" 连用；if 则不可。 5. 引导同位语从句 Whether he will come is not clear. 大部分连接词引导的主语从句都可以置于句末，用 it充当形式主语。 It is not important who will go. It is still unknown which team will win the match. 二. 主语从句作句子主语的从句叫主语从句。主语从句通常由从属连词that，whether，if，as if和because等连接代词what，who，which，whatever，whoever，whom等以及连接副词how，when，where，why等词引导。that在句中无词义，只起连接作用；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。because引导表语从句。注：whom、who指人，what指物，whatever，whoever表示泛指意义。例如： What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。 Who will win the match is still unknown. 谁能赢得这场比赛还不得而知。 It is known to us how he became a writer. 我们都知道他是如何成为一名作家的。 Where the English evening will be held has not yet been announced. 英语晚会将在哪里举行，还没有宣布。 有时为避免句子头重脚轻，常用形式主语it代替主语从句作形式主语放于句首，而把主语从句置于句末。主语从句后的谓语动词一般用单数形式。常用句型如下： （1） It + be + 名词 + that从句 （2）It + be + 形容词 + that从句 （3）It + be + 动词的过去分词 + that从句 （4）It + 不及物动词 + that 从句 另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“(should) +do”，常用的句型有： It is necessary (important, natural, strange, etc.) that … It is suggested (requested, proposed, desired, etc.) that… 三、宾语从句名词从句用作宾语的从句叫宾语从句。引导宾语从句的关联词与引导主语从句表语从句的关联词大致一样，在句中可以作谓语动词或介词及非谓语动词的宾语。 1. 由连接词that引导的宾语从句 由连接词that引导宾语从句时，that在句中不担任任何成分，在口语或非正式的文体中常被省去，但如从句是并列句时,第二个分句前的that不可省。例如： He has told me that he will go to Shanghai tomorrow. 他已经告诉我他明天要去上海。 We must never think (that) we are good in everything while others are good in nothing. 我们决不能认为自己什么都好，别人什么都不好。 注意：在demand、order、suggest、decide、insist, desire, request, command, doubt等表示要求、命令、建议、决定等意义的动词后，宾语从句常用“（should）+ 动词原形”。例如： I insist that she (should) do her work alone. 我坚持要她自己工作。 The commander ordered that troops (should) set off at once. 司令员命令部队马上出发。 2. 用who，whom, which, whose, what, when, where, why, how, whoever, whatever, whichever等关联词引导的宾语从句相当于特殊疑问句，应注意句子语序要用陈述语序。例如： I want to know what he has told you. 我想知道他告诉了你什么。 She always thinks of how she can work well. 她总是在想怎样能把工作做好。 She will give whoever needs help a warm support. 凡需要帮助的人，她都会给予热情的支持。 3. 用whether或if引导的宾语从句，其主语和谓语的顺序也不能颠倒，仍保持陈述句语序。此外，whether与if 在作“是否”的意思讲时在下列情况下一般只能用whether，不用if： a. 引导主语从句并在句首时；b. 引导表语从句时；c . 引导从句作介词宾语时；d. 从句后有“or not”时；e. 后接动词不定式时。例如： Whether there is life on the moon is an interesting question. 月球上有没有生命是个有趣的问题。 Everything depends on whether we have enough money. 一切要看我们是否有足够的钱。 I wonder whether he will come or not. 我想知道他来还是不来。 Can you tell me whether to go or to stay? 你能否告诉我是去还是留？ 4. 注意宾语从句中的时态呼应，当主句动词是现在时，从句根据自身的句子情况，而使用 不同时态。例如： I know (that) he studies English every day. （从句用一般现在时） I know (that) he studied English last term. （从句用一般过去时） I know (that) he will study English next year. （从句用一般将来时） I know (that) he has studied English since 1998. （从句用现在完成时） 当主句动词是过去时态（could, would除外），从句则要用相应的过去时态，如一般过去时，过去进行时，过去将来时等；当从句表示的是客观真理，科学原理，自然现象，则从句仍用现在时态。例如： The teacher told us that Tom had left us for America． 5. think, believe, imagine, suppose等等动词引起的否定性宾语从句中，要把上述主句中的动词变为否定式。即将从句中的否定形式移到主句中。例如： We don’t think you are here. 我们认为你不在这。 I don’t believe he will do so. 我相信他不会这样做。 四、表语从句在复合句中，位于系动词之后作表语的从句叫表语从句。引导表语从句的关联词与引导主语从句的关联词大致一样，表语从句位于连系动词后，有时用as if引导。其基本结构为：主语 + 系动词 + that从句。例如： The fact is that we have lost the game. 事实是我们已经输了这场比赛。 That’s just what I want. 这正是我想要的。 This is where our problem lies. 这就是我们的问题所在。 That is why he didn’t come to the meeting. 那就是他为什么不到会的原因。 It looks as if it is going to rain. 看上去天要下雨了。 需要注意的，当主语是reason时，表语从句要用that引导而不是because。例如： The reason why he was late was that he missed the train by one minute this morning . 【注意】whether 可引导表语从句，但与之同义的if却通常不用于引导表语从句。 五、同位语从句同位语从句说明其前面的名词的具体内容。同位语从句通常由that引导，可用于同位语从句的名词有advice、demand、doubt、fact、hope、idea、information、message、news、order、problem、promise、question、request、suggestion、truth、wish、word等。例如： The news that we won the game is exciting. 我们赢得这场比赛的消息令人激动。 I have no idea when he will come back home. 我不知道他什么时候回来。 The thought came to him that Mary had probably fallen ill. 他想到可能玛丽生病了。 同位语从句和定语从句的区别： that作为关系代词，可以引导定语从句，充当句子成分，在从句中作宾语时可以省略； that引导同位语从句时，起连词的作用，没有实际意义，不充当句子成分，一般不能省略。 试比较下面两个例句: I had no idea that you were here．（that引导同位语从句，不能省略） Have you got the idea（that）this book gives you of life in ancient Greece？（that引导定语从句，作宾语，可以省略） 六、名词性that-从句（1）由从属连词that引导的从句叫做名词性that-从句。That只起连接主句和从句的作用，在从句中不担任任何成分，本身也没有词义。名词性that-从句在句中能充当主 语、宾语、表语、同位语和形容词宾语，例如： 主语：That she is still alive is her luck. 她还活着全靠运气。 宾语：John said that he was leaving for London on Wednesday. 约翰说他星期三要到伦敦去。 表语：The fact is that he has not been seen recently. 事实是近来谁也没有见过他。 同位语：The fact that he has not been seen recently disturbs everyone in his office. 近来谁也没有见过他，这一事实令办公室所有的人不安。 形容词宾语：I am glad that you are satisfied with your job. 你对工作满意我感到很高兴。 2）That-从句作主语通常用it作先行词，而将that-从句置于句末，例如： It is quite clear that the whole project is doomed to failure. 很清楚，整个计划注定要失败。 It’s a pity that you should have to leave. 你非走不可真是件憾事。 用it作形式主语的that-从句有以下四种不同的搭配关系： a. It + be +形容词+ that-从句 It is necessary that… 有必要…… It is important that… 重要的是…… It is obvious that… 很明显…… b. It + be + -ed 分词+ that-从句 It is believed that… 人们相信…… It is known to all that… 众所周知…… It has been decided that… 已决定…… c. It + be +名词+ that-从句 It is common knowledge that… ……是常识 It is a surprise that… 令人惊奇的是…… It is a fact that… 事实是…… d. It +不及物动词+ that-从句 It appears that… 似乎…… It happens that… 碰巧…… It occurred to me that… 我突然想起…… 七、名词性wh-从句1）由wh-词引导的名词从句叫做名词性wh-从句。Wh-词包括who, whom,. whose, whoever, what, whatever, which, whichever等连接代词和where, when, how, why等连接副词。Wh-从句的语法功能除了和that-从句一样外，还可充当介词宾语、宾语补语和间接宾语等，例如： 主语： How the book will sell depends on its author. 书销售如何取决于作者本人。 直接宾语：In one’s own home one can do what one likes. 在自己家里可以随心所欲。 间接宾语：The club will give whoever wins a prize. 俱乐部将给得胜者设奖。 表语： My question is who will take over president of the Foundation. 我的问题是谁将接任该基金会主席职位。 宾语补足语：She will name him whatever she wants to. 她高兴给他起什么名字就取什么名字。 同位语： I have no idea when he will return. 我不知道他什么时候回来。 形容词宾语：I’m not sure why she refused their invitation. 我尚不能肯定她为什么拒绝他们的邀请。 介词宾语： That depends on where we shall go. 那取决于我们去哪儿。 2）Wh-从句作主语也常用先行词it做形式主语，而将wh-从句置于句末，例如： It is not yet decided who will do that job. 还没决定谁做这项工作。 It remains unknown when they are going to get married. 他们何时结婚依然不明。 八、if, whether引导的名词从句 1）yes-no型疑问从句从属连词if, whether引导的名词从句是由一般疑问句或选择疑问转化而来的，因此也分别被称为yes-no型疑问句从句和选择型疑问从句，其功能和wh-从句的功能相同， 例如： 主语：Whether the plan is feasible remains to be proved. 这一计划是否可行还有待证实。 宾语：Let us know whether / if you can finish the article before Friday. 请让我们知道你是否能在星期五以前把文章写完。 表语：The point is whether we should lend him the money. 问题在于我们是否应该借钱给他。 同位语：They are investigating the question whether the man is trustworthy. 他们调查他是否值得信赖。 形容词宾语： She’s doubtful whether we shall be able to come. 她怀疑我们是否能够前来。 介词宾语： I worry about whether he can pass through the crisis of his illness. 我担心他是否能度过疾病的危险期。 2）选择性疑问从句选择性疑问从句由关联词if/whether…or或whether…or not构成，例如： Please tell me whether / if they are Swedish or Danish. 请告诉我他们是瑞典人还是丹麦人。 I don’t care whether you like the plan or not.我不在乎你是否喜欢该计划。 if和whether的区别： 1、 在动词不定式之前只能用whether 。如： 例8 I can’t decide whether to stay. 我不能决定是否留下。 2、 在whether …… or not 的固定搭配中。如： 例9 I want to know whether it’s good news or not . 我想知道是否是好消息。 3 、在介词后，只能用whether。如： 例10 His father is worried about whether he lose his work . 他的父亲担心是否会失去工作。 4、宾语从句放在句首表示强调时，只能用whether 。如： Whether this is true or not, I really don’t know. 这是否真的，我真的不知道。 （例11 Whether they can finish the work on time is still a problem . 他们是否能准时完成这项工作还是个问题。－－此例为主语从句，有误，感谢指出） 5、用if会引起歧义时，只用whether。如： 例12 Could you tell me if you know the answer ? 这句话有两种意思：“你能告诉我是否知道答案吗？”或“如果你知道答案，请告诉我，好吗？”。如用whether可避免歧义. 九、否定转移1) 将think, believe, suppose, expect, fancy, imagine等动词后面宾语从句的否定词转移到主句中，即主句的谓语动词用否定式，而从句的谓语动词用肯定式。 I don’t think I know you. 我想我并不认识你。 I don’ t believe he will come. 我相信他不回来。 注意：若谓语动词为hope,宾语从句中的否定词不能转移。 I hope you weren’t ill. 我想你没有生病吧。 2) 将seem, appear 等后的从句的否定转移到前面。 It doesn’t seem that they know where to go. 看来他们不知道往哪去。 It doesn’t appear that we’ll have a sunny day tomorrow. 看来我们明天不会碰上好天气。 3) 有时将动名词，介词短语或整个从句的否定转变为对谓语动词的否定。 I don’t remember having ever seen such a man. 我记得从未见过这样一个人。 (not否定动名词短语 having…) It’s not a place where anyone would expect to see strange characters on the street. 在这里，人们不会想到在街上会碰上陌生的人。 (anyone 作主语，从句中的谓语动词不能用否定形式。) 4) 有时状语或状语从句中否定可以转移到谓语动词前。 The ant is not gathering this for itself alone. (否定状语) 蚂蚁不只是为自己采食。 He was not ready to believe something just because Aristotle said so. (否定because状语) 他并不因亚里斯多德说过如何如何，就轻信此事。 She had not been married many weeks when that man’s younger brother saw her and was struck by her beauty. (否定状语many weeks) 她结婚还不到几个星期，这个人的弟弟就看见她了，并对她的美貌着了迷。

介绍高中英语语法句子举例

一、名词性从句1.What he wants to tell us is not clear.他要跟我们说什么，还不清楚。2.It’s splendid that you passed your exam.你通过考试了，真棒。3.Everything depends on whether we have enough money.一切要看我们是否有足够的钱。二、形容词性从句(定语从句)1.这是他们曾经住过的地址。It is the place where he once lived.2.The one who cleans the blackboard should be praised.擦黑板的那一位应该受到表扬。3.我们将尝试着帮助家长改善他们与孩子交谈的方式。We will try to help parents improve the ways (that/in which) they talk with their children.三、副词性从句1.I  didn’t realize how great my mother was until I became a mother.直到我成为了一个成年人我才意识到我的母亲是多么的特殊。2.While John was watching TV, his wife was cooking.当约翰在看电视时，他的妻子正在做饭。3.No sooner had I arrived home than it began to rain.还没等我到家就开始下雨了。名词性从句和定语从句的区别就是，关系副词引导的句子跟先行词关系不同，名词性从句跟先行词的关系是平行的，只是后边的句子做进一步解释，同位语从句是最好的例子，定语从句跟先行词的关系是……的关系，副词性从句最简单就是一些副词引导时间或者条件状语从句。

高中英语语法名词性从句考点

高中英语语法名词性从句考点

　　名词性从句包括主语从句、宾语从句、表语从句和同位语从句。因为它是从句，因此具有句子的特点，有主、谓成分；同时又具有名词性特点，所以可以在句子中作主语、宾语、表语或同位语。

　　一、引导词 what 与 that 的区别

　　引导主、宾、表语从句时，what 要充当主语、宾语或表语等句子成分，that 不作任何成分，而只在语法上起连接作用。例如

　　_________ we can’t get seems better than _________ we have.

　　A. What； what B. What； that

　　C. That； that D. That； what

　　解析：本句包含一个主语从句和一个宾语从句，且两个从句都缺乏宾语，可见两个引导词都必须充当从句的宾语，所以答案为 A 项。

　　在下面的例句中，that 不充当任何成分，只起语法连接作用（因为句子本身不缺成分）：

　　That the former Iraq president Saddam was captured has been proved.

　　我们猜您可能喜欢以下文章： 雅思作文技巧让步段在大作文中的应用雅思写作提高形式主语it在中的应用最简化雅思写作：写作基础——语法的提高方法雅思写作提高中的连贯性（二）雅思写作技巧语法篇之--宾语从句日语口语教程：日语的态（可能态和被动态）日语口语经典教材：日语的态（可能态和被动态）日语口语对话王：は和が两个助词超总结gre词汇备考：词根ject雅思写作范文：制约中国考生取得高分的六大因素 高考英语语法:高中英语语法-名词性从句九大考点及热点问题

　　二、引导词 whether 和 if 的区别

　　通常，引导主语从句、表语从句和同位语从句时，连词要用 whether，而不用 if ；习惯上也只能说 whether or not，而不说 if or not .例如：

　　_________ the meeting will be held in Beijing is not known yet.

　　A. Whenever B. If

　　C. Whether D. That

　　解析：题中的从句位于句首，不难知道这是一个主语从句，根据句意，答案为 C 项。但如果宾语或主语从句为否定句时，只能用 that，不能用 whether 引导。如：

　　That you don’t like him is none of my business.

　　三、名词性从句的语序

　　与别的从句一样，名词性从句必须用自然语序，即使在疑问句中，从句也不倒装（而在主句上倒装）。例如：

　　No one can be sure _________ in a million years.

　　A. what man will look like

　　B. what will man look like

　　C. man will look like what

　　D. what look will man like

　　解析：由于从句不能倒装，所以答案只能选 A 项。同时还须注意，从句的引导词必须始终置于句首。

　　四、 who / whoever，what / whatever 等的区别

　　一般说来，what / who 等含特指意义，而 whatever，whoever 等含泛指意义。例如：

　　我们猜您可能喜欢以下文章： 雅思作文技巧让步段在大作文中的应用雅思写作提高形式主语it在中的应用最简化雅思写作：写作基础——语法的提高方法雅思写作提高中的连贯性（二）雅思写作技巧语法篇之--宾语从句日语口语教程：日语的态（可能态和被动态）日语口语经典教材：日语的态（可能态和被动态）日语口语对话王：は和が两个助词超总结gre词汇备考：词根ject雅思写作范文：制约中国考生取得高分的`六大因素 高考英语语法:高中英语语法-名词性从句九大考点及热点问题

　　It is generally considered unwise to give a child _________ he or she wants.

　　A. however B. whatever

　　C. whichever D. whenever

　　解析：答案为 B 项。 Whatever 引导一个宾语从句，并且作 wants 的宾语。这里的 whatever 不能改成 what，因为题意想表达的显然是无论孩子要什么，就给他 / 她什么是不明智的，具有泛指的概念。同时要注意，这里 whatever 也不能改用 no matter what，因为后者只能引导状语从句。

　　五、 where，when，why 等连接副词引导的名词性从句

　　where，when，why 等连接副词也可以引导名词性从句，使用的关键是：这个词必须符合句子的逻辑要求。例如：

　　— I drove to Zhuhai for the air show last week.

　　— Is that _________ you had a few days off？

　　A. why B. when C. that D. where

　　解析：答案为 A 项，why 引导的从句作表语，同时 why 在从句中作原因状语。又如：

　　— Do you remember _________ he came？

　　— Yes. I do，he came by car.

　　A. how B. when C. that D. if

　　解析：答案为 A 项。从答语 he came by car 可知，这里问的是 he 来的方式，所以用 how 引导。

　　六、介词 + who（m） 引导的宾语从句与介词 +who（m） 引导的宾语从句的区别

　　我们猜您可能喜欢以下文章： 雅思作文技巧让步段在大作文中的应用雅思写作提高形式主语it在中的应用最简化雅思写作：写作基础——语法的提高方法雅思写作提高中的连贯性（二）雅思写作技巧语法篇之--宾语从句日语口语教程：日语的态（可能态和被动态）日语口语经典教材：日语的态（可能态和被动态）日语口语对话王：は和が两个助词超总结gre词汇备考：词根ject雅思写作范文：制约中国考生取得高分的六大因素 高考英语语法:高中英语语法-名词性从句九大考点及热点问题

　　介词后面的引导词用主格还是宾语，决定于它在宾语从句中作主语还是宾语。例如：

　　It was a matter of _________ would take the position.

　　A. who B. whoever

　　C. whom D. whomever

　　解析：答案为 A 项。由于这里的引导词在从句中作主语，所以要用主格 who （作宾语时自然要用 whom ）。比较下例：

　　Our country has thousands of excellent scientists，most of whom have received higher education at home.

　　这是一个介词 + 关系代词引导的定语从句。引导定语从句的是 most of + 关系代词，而不只是这个关系代词，同时这个引导词又作介词 of 的宾语，所以要用宾格 whom .

　　七、名词性从句中有插入成分时

　　此时应注意两点：一是从句仍然不倒装，而在插入成分上倒装；二是要注意主语的主格和宾格的选择。例如：

　　_________ you have seen both fighters，_________ will win？

　　A. Since； do you think who

　　B. As； who you think

　　C. When； whoever

　　D. Since； who do you think

　　解析：答案为 D 项。其中 do you think 是插入成分，其余部分是宾语从句，作 think 的宾语。由于引导词在从句中作主语，所以要用主格 who .

　　我们猜您可能喜欢以下文章： 雅思作文技巧让步段在大作文中的应用雅思写作提高形式主语it在中的应用最简化雅思写作：写作基础——语法的提高方法雅思写作提高中的连贯性（二）雅思写作技巧语法篇之--宾语从句日语口语教程：日语的态（可能态和被动态）日语口语经典教材：日语的态（可能态和被动态）日语口语对话王：は和が两个助词超总结gre词汇备考：词根ject雅思写作范文：制约中国考生取得高分的六大因素 高考英语语法:高中英语语法-名词性从句九大考点及热点问题

　　八、引导词 that 的省略

　　引导宾语从句时，that 通常可以省略，但引导主语、表语和同位语从句时，that 不能省略。例如：

　　China’s success in manned-space-craft travel shows _________ out country has become one of the greatest powers in space research.

　　A. what B. which

　　C. 不填 D. it that

　　解析：该句中的从句作 shows 的宾语，是宾语从句，又因为从句中不缺主语、宾语，所以只能用 that 引导；又因引导宾语从句时 that 可以省略，所以答案是 C 项。

　　九、同位语从句引导词 where，when 的用法特点

　　说明先行词内容的同位语从句的引导词 where，when 与被说明的名词在概念上不一致。但引导定语从句的引导词却必须保持一致。试比较：

　　① Then arose the question _________ we were to get so much money.

　　② This is the house _________ the great man Mao Zedong was born 110 years ago.

　　A. where

　　B. that

　　C. about which

　　D. in which

　　解析：①的答案为 A 项；②的答案为 A 项或 D 项。先行词与 where，when 概念一致时，是定语从句，此时，关系副词 where 或 when 可以用介词 +which 形式代替。①中的 question 与 where 不表同一概念，可见是同位语从句，where 不能改用介词 +which 的形式。②中的 house 与 where 同表地点，所以选 A 项或 D 项都可以。

　　我们猜您可能喜欢以下文章： 雅思作文技巧让步段在大作文中的应用雅思写作提高形式主语it在中的应用最简化雅思写作：写作基础——语法的提高方法雅思写作提高中的连贯性（二）雅思写作技巧语法篇之--宾语从句日语口语教程：日语的态（可能态和被动态）日语口语经典教材：日语的态（可能态和被动态）日语口语对话王：は和が两个助词超总结gre词汇备考：词根ject雅思写作范文：制约中国考生取得高分的六大因素 高考英语语法:高中英语语法-名词性从句九大考点及热点问题

　　黑龙江 荆棘

　　《高中英语语法-名词性从句九大考点及热点问题》由英语整理,更多请访问:/english/我们猜您可能喜欢以下文章： 雅思作文技巧让步段在大作文中的应用雅思写作提高形式主语it在中的应用最简化雅思写作：写作基础——语法的提高方法雅思写作提高中的连贯性（二）雅思写作技巧语法篇之--宾语从句日语口语教程：日语的态（可能态和被动态）日语口语经典教材：日语的态（可能态和被动态）日语口语对话王：は和が两个助词超总结gre词汇备考：词根ject雅思写作范文：制约中国考生取得高分的六大因素

关于高中英语语法名词性从句的几个题目

4. 名词性从句中主语从句,it做形式主语,选that引导从句 5,选B 这是表语从句,用在be 动词之后,因为agree + （with +名词,）做状语 6,选D 表语从句,因为with+名词,所以是用what 7,选C for +名词,用what引导,这是介词+宾语,介宾结构 8, C 主语从句,what surprised me most , was 后面是表语从句 9,B 这是定语从句,as引导 10,A 主语从句,it 做形式主语 11,选D what is reported in the newspaper做主语 您好 建议您多看看这些句子的结构,多记忆和理解 主语从句,就是主语是句子 宾语从句就是宾语是句子 表语从句 就是表语是句子构成 多做习题 多分析 一、概说 名词性从句,即指性质相当于名词的从句,它包括主语从句、宾语从句、表语从句和同位语从句.从高考的考查的实际情况来看,名词性从句考得最多的是宾语从句,其次是主语从句,再次是表语从句,而同位语从句则很少考查. 二、名词性从句的一般引导词 1.连接词 that 引导名词性从句时,只起连接作用,没有任何意思,也不充当句子成分,在宾语从句中可省略,但引导其他名词性从句时通常不省略.如： I hope (that) you enjoy your holiday. 希望你假期过得好. That he likes you is very obvious. 很显然他喜欢你. 2.连接词 whether 引导名词性从句也不充当句子成分,但有自己的意思,表示“是否”；引导宾语从句时,可换成 if,但引导其他名词性从句时不能换成 if.如 He asked whether I would show him the way. 他问我是否可以给他带路. Whether it will do us harm remains to be seen. 是否对我们有害还要看一看.(引导主语从句,不能用 if 代替 whether) 3.连接代词 who(m), whose, which, what 等引导名词性从句时,均有各自的意义,在从句中作主语、宾语、定语等.如： That’s why she wanted to leave. 这就是她想离开的原因. When we arrive doesn’t matter. 什么时候到没有关系. Tell me which one you like best. 告诉我你最喜欢哪一个. 4.连接副词 when, where, why, how 等引导名词性从句,也各自有自己的意义,在从句中作状语.如： The question is how we should carry out the plan. 问题是怎样执行这个计划. When she’ll be back depends much on the weather. 她什么时候回来在很大程度上要看天气. Why he did it will remain a puzzle forever. 他为什么这样做将永远是一个谜. 三、名词性从句的重要引导词 1. what 用于引导名词性从句是一个十分重要的引导词,它可引导主语从句、宾语从句和表语从句,但不用于引导同位语从句.它引导的名词性从句有两个意思是：一是表示“什么”,带有疑问意味；二是表示“…所…的”,相当于一个先行词后接一个关系代词.如： I don’t know what you want. 我不知道你想要什么. I don’t know what you want is this. 我不知道你所想要的是这个. 2. what 引导名词性从句时可用作限定词,其后修饰名词.如： I gave him what books I had. 我把我所有的书都给他了. He gave me what money he had about him. 他把身边带有的钱全给了我. 注：what 后的名词可以是复数名词或不可数名词,但通常不能是单数可数名词,并且后接不可数名词时,有时可有little修饰,两者的区别是：what+不可数名词=所有的都,what little+不可数名词=虽少但全部.如： What friends she has are out of the country. 她有的那些朋友全在国外. We gave him what (little) help we could. 我们给了他我们力所能及的帮助. 3. whoever, whatever, whichever 等也可引导名词性从句,其意分别为“所…的一切事或东西”、“任何…的人”、““…的任可人或物”等.如： Whoever wants the book may have it. 任何人要这书都可拿去. I’ll do whatever I can to help him. 我们将尽我们所能来挽救他. Buy whichever is cheapest. 买最便宜的. 注意以下受汉语意思影响而弄错的句子： 任何人来都欢迎 误：Who es will be wele. / Anyone es will be wele. 正：Whoever es will be wele. / Anyone who es will be wele. 另外,它们也可引导让步状语从句,其意为“无论…”、“不管…”,其意相当于 no matter who .如： Whatever happens, you must be calm. 不管发生什么情况,你都必须镇静.(whatever = no matter what) He won’t eat you, whoever he is. 不管他是谁,他也不能把你吃掉.(whoever = no matter who) 注：whoever 引导名词性从句时既用作主格也用作宾语；作宾语时不宜用 whomever,因为在现代英语中 whomever 这个已几乎废弃不用. 4. why 与 because 的用法区别.两者均可引导表语从句,但前者强调结果,后者强调的原因.如： I had a cold. That’s why I didn’t e. 我感冒了,因此我没来. I didn’t e. That’s because I had a cold. 我没有来,那是因为我感冒了. 五、名词性从句的语序 名词性从句的词序与陈述句语序相同,尤其注意那些由连接代词who(m), whose, which, what 和连接副词 when, where, why 等引导的名词性从句,不要受它们在特殊疑问句中用法的影响而误用疑问句词序.如： Why was she crying? 她为什么在哭? I don’t know why he was crying. 我不知道她为什么哭. 六、名词性从句的时态问题 1.当主句的谓语动词是过去式时,宾语从句若不是一个客观事实或真理,其谓语动词也必须用某种过去时态.如： She said that she didn’t want to know. 她说她不想知道. I asked her whether she would agree. 我问她是否会同意 2. when, if 这两个词既可引导名词性从句,也可引导状语从句.当它们引导名词性从句且表示将来意义时,要直接使用将来时态；但当它们引导状语从句且表示将来意义时,则必须用一般现在时表示将来意义.如： I don’t know when he will e, but when he es, I’ll call you. 我不知道他什么时候,但当他来的时候,我会打电话给你. 句中第一个when 引导的是宾语从句,故用将来时态表示将来意义；第二个when 引导的是时间状语从句,故用一般现在时表示将来意义.