下载文档原格式
名词性从句讲解(最全版)名词性从句是一个从句，它在句子中充当名词的角色。
它可以作为主语、宾语、表语、同位语或介词宾语。
名词性从句通常由连接词引导，如that、whether、if、who、whom、whose、which、what等。
1. 作为主语：名词性从句可以作为主语，取代一个名词或名词短语，引导词通常为that或whether。
例如：- What you said is true.（你说的是真的。
）- Whether he will come is still uncertain.（他是否会来还不确定。
）2. 作为宾语：名词性从句可以作为及物动词或介词的宾语，引导词通常为that、whether、if、who、whom、whose、which、what等。
例如：- She asked me what I wanted.（她问我想要什么。
）- I don't know if/whether he will come.（我不知道他是否会来。
）3. 作为表语：名词性从句可以作为系动词的表语，引导词通常为that、whether、who、whom、whose、which、what等。
例如：- The problem is that she doesn't understand.（问题在于她不理解。
）- The question is who will take care of them.（问题是谁会照顾他们。
）4. 作为同位语：名词性从句可以作为同位语，解释或说明前面的名词或代词，引导词通常为that、whether、who、whom、whose、which、what等。
例如：- The fact that he lied surprised me.（他撒谎的事实让我感到惊讶。
）- His belief that she will succeed is unwavering.（他坚信她会成功。
名词性从句1.名词性从句的定义名词性从句是起名词作用的从句，这些从句可以作为一个整体来看，其作用就相当于一个名词，在复合句中作主语，宾语，表语和同位语。
名词性从句包括主语从句，表语从句，宾语从句，同位语从句四种。
2.名词性从句的连接词名词性从句通常由一个连接词和主句相连。
连接词很重要，它既是联系主句的纽带，又是从句的标志，通过连接词，我们可以辨认不同从句的性质。
一．从属连接词（在从句中不充当任何成分，只起到连接从句的功能）A．that 只是引导名词性从句，本身并没有实际意义，在从句中不充当任何句子成分。
That he will come to the meeting is certain.(主语从句)The fact remains that we are behind the other group.(同位语从句)B．if和whether具有“是否”的意义，但是whether比较正式，在口语中人们经常if, if 和whether在名词性从句中尽管不充当任何的成分，但不可以省略。
C．whether不能替代if的情况1.if只能引导宾语从句（做介词宾语的情况除外），而whether 可以引导所有的名词性从句。
She asked if/ whether that was enough.Whether the football match will be played depends on the whether.The question is whether we can arrive there on bus.2.whether引导宾语从句做介词的宾语，if没有这种用法It depends on whether it will be fine.3.whether后紧跟不定式He was wondering whether to go home.4.or not 可直接跟在whether后面，但不可以直接跟在if后面。
名词性从句的三种类型及例句解析名词性从句是指在一个句子中充当名词的从句。
它可以作主语、宾语、表语和同位语等，并能够起到连接子句与主句的作用。
在英语语法中，有三种主要类型的名词性从句：宾语从句、主语从句和表语从句。
本文将详细解析这三种类型，并举例说明其用法。
一、宾语从句宾语从句作为一个整体出现在主句中的动词后面，充当主句的宾语。
它常常引导由that、whether/if、wh-疑问词引导的从句。
下面是一些例句：1. 主句：He asked me a question.宾语从句：He asked me whether I had finished my homework.解析：宾语从句"whether I had finished my homework"作为动词"ask"的宾语，表达了一个疑问。
2. 主句：She doesn't know the answer.宾语从句：She doesn't know what the answer is.解析：宾语从句"what the answer is"作为动词"know"的宾语，表示对答案的不知道。
3. 主句：They wonder if he will come to the party.宾语从句：They wonder if/whether he will come to the party.解析：宾语从句"if/whether he will come to the party"作为动词"wonder"的宾语，表达了对他是否会来参加派对的疑问。
二、主语从句主语从句作为一个整体出现在句子的最前面，充当主句的主语。
它通常由that引导，也可以由wh-疑问词引导。
以下是一些例句：1. 主句：It is important to learn a foreign language.主语从句：That she is a hardworking student is important.解析：主语从句"That she is a hardworking student"作为句子的主语，强调了她是一个勤奋的学生的重要性。
什么是名词性从句？名词性从句（Noun Clauses）是一个在句子中充当名词的从句。
它可以在句子中担任主语、宾语、表语或补语的角色。
名词性从句通常由连词引导，例如that, whether, if, who, whom, whose, what, which, when, where, why等。
以下是名词性从句在不同角色中的示例：1. 主语（Subject）：- What she said surprised me.（她所说的让我感到惊讶。
）- Whether we go or not is up to you.（我们去与否由你决定。
）2. 宾语（Object）：- I know that he is coming.（我知道他要来。
）- She asked me where I was going.（她问我要去哪里。
）3. 表语（Predicate）：- The problem is how to solve it.（问题是如何解决它。
）- His wish is that everyone gets along.（他的愿望是每个人和睦相处。
）4. 补语（Complement）：- The important thing is what you do next.（重要的是你接下来要做什么。
）- His goal is to become a doctor.（他的目标是成为一名医生。
）名词性从句的使用可以使句子更加丰富和灵活，它可以替代一个独立的名词，并在句子中承担相应的语法角色。
名词性从句可以用于各种不同的语境，包括陈述句、疑问句和感叹句等。
需要注意的是，名词性从句的引导词可以根据从句的具体内容和功能而有所不同。
因此，在使用名词性从句时，我们需要根据语境和句子的需要选择适当的引导词。
了解和掌握名词性从句的概念和用法，可以帮助我们在英语表达中更加灵活和准确地使用不同类型的从句。
名词性从句有哪些名词性从句共有四种，分别是主语从句（整个从句在主句中做主语），表语从句（整个从句在主句中做表语），同位语从句（整个从句在主句中做同位语），宾语从句四类（整个从句在主句中做宾语）。
名词性从句有哪些1、主语从句例如：It + be + 形容词/名词/动词过去分词 + that 从句It is strangethat he knows nothing about it.从句：He knows nothing about it.主句：It is strange something (= He knows nothing about it).连接词在从句中是否充当成分：否连接词是否可省：否2、宾语从句例如：that 引导的宾语从句I think that English is important.从句：English is important.主句：I think something (= English is important).连接词在从句中是否充当成分：否连接词是否可省：是3、表语从句用法和结构同宾语从句，区别在于：系动词后面所接的从句为表语从句，而及物动词后面所接的从句为宾语从句。
例如：- that 引导的表语从句The truth is that English is important.从句：English is important.主句：The truth is something (= that English is important).4、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。
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，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。
名词性从句一名词性从句包括主语从句、宾语从句、表语从句、同位语从句。
1．主语从句：主语从句在整个句子中作主语。
(1)不同于其它的连词，它不充当句子的成分，只是单纯的连接词，通常不可以省略,有时为了保持句子平衡, that从句后置, 而由it作形式主语。
其他类似句型还有：It + be +important/ necessary/ obvious + that 从句It + be +reported/believed/thought/has been decided + that从句It + be +a pity/a shame/a fact/a surprise/ common knowledge+ that从句It + happens/occurs/seems/appears + that 从句That the driver could not control his war was obvious.It was obvious that the driver could not control his car.(2)if 不能用在主语从句中，而是用whether Whether he left (or not) is unknown(3)当主语从句作主语时，谓语动词一般用第三人称单数What we need is more time and money.What we need are many more books.2.表语从句：表语从句出现在系动词后，充当表语。
其基本结构为: 主语 + 系动词 + that从句。
The trouble is that we are short of money.Go and get your coat. It’s where you left it.3.宾语从句：及物动词，形容词和介词后加宾语从句作其宾语。
(1)宾语从句时态与主句相呼应，但宾语从句表示的是客观真理或普遍现象除外The teacher told us that the earth moves aroundthe sun(2)连词whether和 if可以互换，但注意下列情况连词后紧跟or not时用whether I want to knowwhether or not they will come. 作介词宾语是用whether引导宾语从句He wasinterested in whether he saw her there. 连接词后直接加不定式，不能用if只能用whether Hedoesn’t know whether to stay or not. 如果宾语从句是否定时，一般用if引导I care ifhe will not attend the meeting.(3)当宾语从句后带宾补时，要用“主语+谓语+it +宾补+that-clause,that不可省略I think it certain that she will do well inher exam.(4)当主语是I, we ，主句用think, believe, suppose, expect, imagine五个动词时，用否定转移I don’t think he will win the game, will he?(5)that在宾语从句常可以省略，但由and或 but连接两个或多个宾语从句时，仅可以省略第一个连词that He said (that) he had eaten nothing but that he wasn’t hungry.(6)注意区别if引导的宾语从句和条件状语从句I don’t know if he will come.If he comes, I’ll let you know.注意：beg, insist, desire, command, order, suggest, advise, demand, require, request等动词如果后面加上宾语从句的话, 从句谓语部分必须用should do。
单项选择：1. Evidence came up _____ specific speech sounds are recognized by babies as young as six months old.A. whichB. whatC. thatD. when2. I haven’t decided _____ hotel to stay at.A. whichB. whatC. at whichD. where3. ______surprises most of us.A. Wolves are afraid of usB. The fact that wolves afraid menC. The fact that wolves are afraid of menD. Wolves’ afraid of men4. The announcement ______all flight were cancelled because of bad weather greatly distressed the waiting passengers.A. thatB. whichC. whyD. of which5. The question is ______can be put into practice.A. how you have learnedB. how what you have learnedC. that why you have learnedD. how that you have learned6. A hinge joint is _______ permits the forwards and backward movement of a door.A. thatB. whatC. thoseD. which7. One reason why Hamlet is such a successful play is that _______.A. it appeals differently to peopleB. different people are appealedC. it appeals to many different peopleD. people find it appealing to them very much8. A more important question is ______these ideas are well or ill founded.A. whereB. whenC. howD. whether9. I think it is _____you are doing too much.A. because ofB. becauseC. because thatD. because for10. No one could understand _______.A. that he was talking aboutB. what he was talking aboutC. he was talking aboutD. which he was talking11. “Call the restaurant and ask for information.” “I don’t remember ______.”A. who I should speakB. whom should I speak withC. with whom I should speakD. who should I speak with12. _______ is where he gets all his money form.A. What I cannot understand itB. That I can’t understand itC. What I can’t understandD. Which I can’t understand it13. Who doubts _______it is true?A. thatB. ifC. whichD. such14. Even the mountains here are no longer _______ they used to be.A. the sameB. whichC. thatD. what15. The reason he is ill is _____ he ate too much.A. due toB. thatC. sinceD. because16. From _______ I know of him I should say that he is reliable.A. whatB. thatC. howD. that which17. I am sure that _______ you said is wrong.A. whichB. whatC. thisD. how18. You may rely on ______everything will be ready by Monday.A. thatB. whichC. it thatD. if19. _______ one can succeed depends on _______ hard he works.A. That…how…B. That…however…C. Whether…how…D. Whether…however…20. The true value of life is not in ______, but _______.A. which we get ,what give weB. what we get ,what we giveC. which do we get ,which do we giveD. how we get ,that we give21. I knew nothing about his journey ______ he was likely to be away for three months.A. ifB. in thatC. except thatD. which22. The fact ______ doctors recommend that children with hypertension drink coffee is surprising.A. whatB. is thatC. thatD. of23. _______ is no reason for discharging her.A. Because she was a few minutes lateB. Owing to a few minutes being lateC. The fact that she was a few minutes lateD. Being a few minutes late24. I have no doubt ______ he will overcome all his difficulties.A. whetherB. whenC. thatD. if25. The old gentleman never fails to help ______is in need of his help.A. whoB. whoeverC. oneD. whomever26. “Is there any particular dessert you would like have?” “_____ you se lect is all right with me .”A. WhateverB. WhichC. ThatD. Whichever27. _______ some mammals came to live in the sea is not known.A. ThatB. WhatC. HowD. Since28. _______is his own decision.A. When he is leavingB. When he leavesC. When does he leaveD. He leaves29. The people at the party were worried about Janet because no one was aware ________ she had gone.A. of whereB. of the placeC. the placeD. the place where30. ________ is of no concern to us.A. It rain or notB. If or not it rainsC. Whether it rains or notD. Will it rain or not31. ________ he said has nothing to do with this task.A. WhatB. WhetherC. ThatD. However what32. We consider __ the instrument should be adjusted each time it is used.A. that it necessaryB. necessary thatC. it necessary thatD. necessary of it that33. ________ breaks the law deserves a fine.A. WhoB. However heC. WhoeverD. No matter who34. Take _______ much you want ________ you want to.A. however, wheneverB. whatever , wheneverC, however, whichever D. whichever , whatever35. You can’t imagine _______.A. what did we have awful weatherB. what weather awful did we haveC. what awful weather we did haveD. what awful weather had we36. I had not even a vague idea ________ was going to happen.A. of whatB. in which C .of which D. in what37. You should respect the opinion of others, and at the same time you should insist upon _______ right.A. that you believe isB. which you believe to beC. what you believe isD. what you believe38. The question remains _______ we should accept their invitation.A. whetherB. thatC. ifD. why39. Free movie tickets will be sent to _______ come first.A. whoeverB. whoeverC. whomD. who40. She is in doubt ________ she accepts your advice.A. ifB. thatC. of whichD. whether41.________ has finished the work ahead of time will be rewarded though we don't know who it will be.A. Those whoB. AnyoneC. WhoeverD. No matter who42. ________ makes the school famous is ________ more than 90% of the students have been admitted to universities.A. What; becauseB. That; becauseC. That; whatD. What; that43. Everything depends on ________ they will support you about it.A. ifB. whichC. whetherD. that44. After ten years, she changed a lot and looked different from_________ she used to be.A. thatB. whomC. whatD. who45. I know nothing about the young lady--- ________ she is from Being.A. exceptB. except forC. except thatD. besides46. The question came up at the meeting ________we had enough money for our research.A. thatB. whatC. whichD. whether47. __________ a terrible storm would take place in Hainan.A. Word came whichB. Word came thatC. Word that cameD. Words came that48. _________ David says sounds right to Helen. That’s why she has made up her mind not to leave him________ happens.A. whatever; whateverB. No matter what; whateverC. No matter what; no matter whatD. Whatever; however49. Mr. Hopkins has not yet answered my question________ I can go with him to ________ he calls the Underground Treasure House next week.A. that; whichB. that; whereC. whether; thatD. whether; what50. --- Don’t you believe me?--- ________, I will believe _________ you say.A. No; whateverB. Yes; no matter whatC. No; no matter whatD. Yes; whatever51. __________ is mentioned above, the number of the students in senior high school is increasing.A. WhichB. AsC. ThatD. It52. See the flags on top of the building? That was ______ we did this morning.A. whenB. whichC. whereD. what53. “What did your parents think about your decision?” “They always let me do ______ I think I should.”A. whenB. thatC. howD. what54. “Could you do me a favor?” “It depends on ____ it is.”A. whichB. whicheverC. whatD. whatever55. There is much chance _______ Bill will recover from his injury in time for the race.A. thatB. whichC. untilD. if56. ______ makes this shop different is that it offers more personal services.A. WhatB. WhoC. WhateverD. Whoever57. Mary wrote an article on _______ the team had failed to win the game.A. whyB. whatC. whoD. that58. The poor young man is ready to accept _______ help he can get.A. whicheverB. howeverC. whateverD. whenever59. As soon as he comes back, I’ll tell him when ______and see him.A. you will comeB. will you comeC. you comeD. do you come60. ______ in the regulations that you should not tell other people the password of your e-mail account.A. What is requiredB. What requiresC. It is requiredD. It requires。
