《高中英语语法大全》第16章名词性从句在句子中起名词作用的句子叫名词性从句。

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．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。

被强调部分指人时也可用who/whom。

例如：a) It is a pity that you didn’t go to see the film. 你不去看那场电影真可惜。

b) It doesn’t interest me whether you succeed or not.我对你成功与否不感兴趣。

c) It is in the morning that the murder took place.谋杀案是在早上发生的。

（强调句型）d) It is John that broke the window.是John打碎的窗户。

（强调句型）2. 用it作形式主语的结构(1) It is ＋名词＋从句It is a fact that …; It is an honor that…; It is common knowledge that…(2) It is ＋形容词＋从句It is natural that…It is strange that…(3) It is ＋不及物动词＋从句It seems that…It happened that…It appears that…(4) It ＋过去分词＋从句It is reported that…It has been proved that…It is said that…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。

例如：正确表达：It is said that President Jiang will visit our school next week.错误表达：That President Jiang will visit our school next week is said.（3）It happens/occurs…结构中的主语从句不可提前。

例如：正确表达：It occurred to him that he failed in the examination.错误表达：That he failed in the examination occurred to him.（4）It doesn’t matter how/whether …结构中的主语从句不可提前。

例如：正确表达：It doesn’t matter whether he is wrong or not.错误表达：Whether he is wrong or not doesn’t matter.（5）含主语从句的复合句是疑问句时，主语从句不可提前。

例如：正确表达：Is it likely that it will rain in the evening?错误表达：Is that will rain in the evening likely?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。

例如：a) What you said yesterday is right.b) That she is still alive is a consolation二．宾语从句宾语从句就是在复合句中作宾语的名词性从句，通常放在主句谓语动词(及物动词) 或介词之后。

1. 作动词的宾语(1) 由that引导的宾语从句(that 通常可以省略), 例如：I heard that he joined the army. 我听说他参军了。

(2) 由what, whether (if) 引导的宾语从句，例如：a) She did not know what had happened.她不知道发生了什么。

b) I wonder whether you can change this note for me.我想知道你是否能帮我改一下笔记。

(3) 动词＋间接宾语＋宾语从句。

例如：She told me that she would accept my invitation.她对我说她会接受我的邀请。

2. 作介词的宾语，例如：Our success depends upon how well we can cooperate with one another.我们的成功取决于我们之间的合作。

3. 作形容词的宾语，例如：I am afraid (that) I’ve made a mistake.我恐怕我已经犯了一个错误。

注意：that 引导的从句常跟在下列形容词后作宾语：anxious, aware, certain, confident, convinced, determined, glad, proud, surprised, worried, sorry, thankful, ashamed, disappointed, annoyed, pleased, hurt, satisfied, content 等。

也可以将此类词后的that 从句的看作原因状语从句。

4. it 可以作为形式宾语it 不仅可以作为形式主语，还可以作为形式宾语而真正的宾语that 从句则放在句尾，特别是在带复合宾语的句子中。

例如：We heard it that she would get married next month. 我听说她下个朋就会结婚了。

5.* 后边不能直接跟that 从句的动词这类动词有allow, refuse, let, like, cause, force, admire, condemn, celebrate, dislike, love, help, take, forgive等。

这类词后可以用不定式或动名词作宾语，但不可以用that引导的宾语从句。

如：正确表达：I admire their winning the match.错误表达：I admire that they won the match.6.* 不可用that从句作直接宾语的动词有些动词不可用于“动词＋间接宾语＋that从句“结构中，常见的有envy, order, accuse, refuse, impress, forgive, blame, denounce, advise, congratulate等。

例如：正确表达：He impressed the manager as an honest man.错误表达：He impressed the manager that he was an honest man.7. 否定的转移若主句谓语动词为think, consider, suppose, believe, expect, fancy, guess, imagine等，其后的宾语从句若含有否定意义，一般要把否定词转移到主句谓语上，从句谓语用肯定式。

例如：I don’t think this dress fits you well. 我认为这件衣服不适合你穿。

三. 表语从句表语从句在复合句中作表语的名词性从句，放在系动词之后，一般结构是“主语＋连系动词＋表语从句”。

可以接表语从句的连系动词有be, look, remain, seem等。

引导表语从句的that常可省略。

另外，常用的还有the reason is that…和It is because 等结构。

例如：1) △The question is whether we can make good preparation in such a short time.2) This is why we can’t get the support of the people.3) But △the fact remains that we are behind the other classes.4) △The reason he is late for school is that he missed the early bus.四. 同位语从句同位语从句就是在复合句中作名词的同位语的名词性从句。

1. 同位语从句的功能同位语从句对于名词进一步解释，说明名词的具体内容，一般由that引导，例如：1) The king’s decision that the prisoner would be set free surprised all the people.2) The order that all the soldiers should stay still is given by the general.2. 同位语在句子中的位置同位语从句有时可以不紧跟在它所说明的名词后面，而是被别的词隔开。

例如：He got the news from Mary that the sports meeting was put off.3. 同位语从句与定语从句的区别(1) 定语从句中的that既代替先行词，同时以在从句中作某个成分（主语或宾语），而同位语从句中的that是连词，只起连接主句与从句的作用，不充当句中任何成分。

(2) 定语从句是形容词性的，其功能是修饰先行词，对先行词加以限定，描述定的性质或特征；同位语从句是名词性的，其功能是对名词进行补充说明。

例如：1) The news that he told me is that Tom would go abroad next year.（他告诉我的消息是汤姆明年将出国。

）（第一个that引导的从句是定语从句，that在从句中作宾语）2)The news that Tom would go abroad is told by him.（汤姆将出国的消息是他讲的。

）（同位语从句，that在句中不作任何成分）名词性从句练习：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. thatB./C. howD. what2. Tell me_____ is on your mind.A. thatB. whatC. whichD. why3. We must stick to _____ we have agreed on.A. whatB. thatC. /D. how4. Let me see _____.A. that can I repair the radioB. whether -I can repair the radioC. I can repair the radioD. whether can I repair the radio5. Keep in mind _____.A. that the teacher saidB. what did the teacher sayC. that did the teacher sayD. what the teacher said6. Could you advise me _____?A. which book should I read firstB. what book should I read firstC. that book 1 should read firstD. which book I should read first7. He was criticized for _____.A. he had done itB. what he had doneC. what had he doneD. that he had done it8. Would you kindly tell me _____?A. how can I get to the Beijing Railway StationB. how I can get to the Beijing Railway StationC. where can I get to the Beijing Railway StationD. whether can I get to the Beijing Railway Station9. Mrs. Smith was very much impressed by _____.A. what had she seen in ChinaB. that she had seen in ChinaC. what she had seen in ChinaD. which had she seen in China10. We took it for granted ___A. that they were not comingB. that were they not comingC. they were coming notD. were they not coining11. I really don't know _____A. I should do nextB. what should I do nextC. what I should do nextD. how I should do next12. I'm afraid _____.A. the little girl will have to be operated onB. that will the little girl have to operate onC. the little girl will have to operate onD. that will the little girl have to be operated on13. She walked up to _____ .A. where did I standB. where I stoodC. I stood thereD. where I stood there14. Can you tell me _____?A. who is that gentlemanB. that gentleman is whoC. who that gentleman isD. whom .is that gentleman15. We'll give you _____.A. that do you needB. what do you needC. whatever you needD. whether do you need16. They want us to know _____ to help us.A. what can theyB. what they canC. how they canD. how can they17. We must put _____ into practice.A. what we have learnedB. that we have learnedC. that have we learnedD. what have we learned18. Did she say anything about _____?A. that the work was to be doneB. how was the work to be doneC. that was the work to be doneD. how the work was to be done19. He was never satisfied with _____.A. what she had achievedB. had what she achievedC. she had achievedD. that she achieved20. These photographs will show you _____.A. what does our village look likeB. what our village looks likeC. how does our village look likeD. how our village looks like21. Peter insisted _____ he pay the bill.A. on thatB. whatC. thatD. on which22. They urged _____ the library open during the vacation.A. whenB. whereC. whyD. that23. We wish we could have learned _____ when we were at high school.A. what you didB. that you had doneC. that what you didD. what did you do24.1 will describe to you _____ I saw when there.A. whatB. thatC. whichD./25. From _____ I should say he is a good worker.A. what 1 know of himB. that I do know of himC. what do I know of himD. that do I know of him26. I will give this dictionary to __ wants to have it.A. whomeverB. anyoneC. whoeverD. someone27._____ they will come here hasn' t been decided yet.A. WhatB. ThatC. WhenD. Where28. _____ was said here must be kept secret.A. WhoB. The thingC. WhateverD. Where29. It is still a question _____ we shall have our sports meet.A. ifB. thatC. whatD. when30. I'm going anyway. _____ she will go is up to her to decide.A. If or notB. Whether or notC. IfD. That31. It is strange _____ she have left without saying a word.A. thatB. whatC. whyD. how32. It is very clear _____ our policy is a correct one.A. whatB. thatC. whyD. where33. _____ Mr Zhang said is quite right.A. ThatB. WhenC. WhatD. Whether34. It has been decided _____ he will be sent there.A. ifB. whetherC. whyD. that35. It doesn' t matter _____he' s come back or not.A. ifB. whetherC. thatD. when36. It's a great pity _____ we won’t be able to finish the task on time.A. whenB. thatC. whyD. where37. It happened _____ I wasn't there that day.A. whenB. whyC. whereD. that38._____ you have done might do harm to other people.A. WhatB. ThatC. WhichD. The things39. _____ leaves the room last ought to turn oft the lights.A. AnyoneB. The personC. WhoeverD.Who40._____ the 2000 Olympic Games won't be held in Beijing is known to all.A. WhetherB. IfC. WheneverD. That41. _____ fails to see this will make a big mistake.A. ThatB. WhoeverC. WhetherD. Whether or not42. __ we need more equipment is quite obvious.A. WhatB. WhetherC. ThatD. Whatever43. Has it been announced _____?A. when are the planes to take offB. that are the planes to take offC. where are the planes to take offD. when the planes are to take off44. That is _____ we all support his idea.A. whatB. whyC. whereD. when45. That’s _____ we should do.A. thatB. whatC. howD. why46. _____ is troubling me is _____ I don’t understand _____ he saidA. What; that; whatB. What; what; whatC. That; that; whatD. Why; that; which47. Things were not _____ they seemed to be.A. whenB. whyC. thatD. what48. Th at’s _____ I want to say.A. all whatB. whatC. all whichD. what that49. That’s _____ .A. where our differences lieB. our differences lie thereC. where do our differences lieD. that where our differences lie50. That is _____ .A. where lived he thereB. where did he liveC. where he livedD. that where he lived51. The questions is _____.A. whether is it worth doingB. that if it is worth doingC. whether it is worth doingD. if it is worth doing52. Water will continue to be _____ it is today next in importance to oxygen.A. howB. whichC. whatD. as53. That's_____.A. how did I become a teacherB. how I became a teacherC. how a teacher I becameD. that I became a teacher54. They are just _____.A. that what shall I haveB. what shall I haveC. that I shall have whatD. what I shall have55. It looked ____.A. as if it was going to rainB. that as if it was going to rainC. as if was it going to rainD. as if that it was going to rain56. That's_____.A. how she did itB. that how did she do it.C. how did she do itD. what she did it57. That is _____ we decided to put the discussion off.A. whereB. whichC. thatD. why58. That’s _____ I lived when I was ten years old.A. whereB. at whichC. there whereD. when59. My suggestion is _____ we should send a few comrades to help them.A. ifB. thatC. when thatD. that where60. The idea _____ all people are selfish is wrong.A. whatB. thatC. whyD. if61. We heard the news _____ our team had won.A. thatB. whatC. whetherD. why62. The fact _____ he hadn’t said anything surprised us all.A. whyB. ifC. thatD. whether63.I have no idea _____ she will be back.A. thatB. whereC. that whenD. when64. We must keep in mind the fact _____ China is still a developing country.A. whetherB. thatC. whyD. when65. They have no idea at all _____.A. where he has goneB. where did he goC. where has he goneD. which place he has gone一、1、表语从句；2、同位语从句；3、不是；4、主语从句；5、同位语从句；6、不是；7、表语从句；8、宾语从句；9、不是；10、宾语从句二、1. which; 2. why; 3. how; 4. What; 5. that; 6. when, where; 7. who(m); 8. what; 9. where; 10. whether三、1~5 DBABD 6~10 DBBCA 11~15 CABCC 16~20 BADAB 21~25 CDAAA26~30 CCCDB 31~35 ABCDB 36~40 BDACD 41~45 BCDBB 46~50 ADBAC51~55 CCBDA 56~60 ADABB 61~65 ACDBA。