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。
名词性从句一.概念在句子中起名词作用的句子叫名词从句(Noun Clauses).名词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。
二.语序所有名词性从句都是引导词(在最前)+陈述句语序(即:主语在前,谓语在后.即使从句表达的是疑问含义).What we can't get seems better than what we have.The photographs will show you what our village looks like.He asked how much I paid for the violin.三.引导词引导名词性从句的引导词类别词义在从句中的作用从属连词that无任何词义仅起连接作用，在从句中不充当任何句子成分从属连词whether和if(是否)意为“是否”，表明从句意义的不确定性起连接作用，在从句中不充当任何句子成分关系代词who, whom, what,which,whose,whoever, whomever, whatever, whichever 有各自自身的意义起连接作用，并在从句中充当主、表、宾、定语等关系副词when, where, why, how, however, whenever, wherever 有各自自身的意义起连接作用，并在从句中充当状语注意:名词性从句引导词,只有that在引导主语从句后置时,以及在引导宾语从句时有时可以省.其它情况下,以及其它名词性从句引导词均不能省.注意:只有在引导宾语从句(有些情况下不能用if代替whether)以及whether引导主语从句后置时才可用if.其它情况下,以及引导其它名词性从句时均不能用if.四.分类详解主语从句在句子中作主语的句子叫主语从句.1.由从属连词that, whether引导的主语从句：▲that引导主语从句放在句首时,that不可省.That light travels in straight line is known to all. (that不能省)That he will succeed is certain. (that不能省)That he is still alive is a wonder. (that不能省)That the baby could speak made his parents very happy. (that不能省)That she became an artist may have been due to her father’s influence. (that不能省)______ you don’t like him is none of my business.(1992上海高考试题)A. WhatB. WhoC. ThatD. WhetherAnswer：C▲whether引导的主语从句一般位于句首.也可用it作形式主语,将其后置,此时whether可换为if. (if引导主语从句时,只能用it作形式主语,放在句首,而将if引导的主语从句放到句末.) Whether she will come or not is still a question.Whether the old couple enjoy the trip remains to be proved.Whether we will hold a party in the open air tomorrow depends on the weather.It was a problem whether they would support us.It remains to be seen whether it will do us harm or good.It is uncertain if he will leave for Beijing tomorrow.2.由关系代词who/whoever; whom/whomever(少); what/whatever; which/whichever; whose 引导的主语从句.Who will the win the scholarship is unknown.Who will be sent abroad to further his studies is not announced.Who murdered the present is being investigated.Whoever comes is welcome.Whoever leaves the room last ought to turn off the lightsWhoever breaks the rule must be punishedWhoever breaks this law deserves a fine.Whoever wants to see this film can go with us tonight.Whoever helped to save the drowning girl is worth praising.Who/whom he will work with is still a secret.Whom we must study for is a question of great importance.Whoever you fell in love with has nothing to do with me.whoever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 已几乎不用).What you have done might do harm to other people.What must be done has been done.What is worth doing is worth doing well.What you said just now hurt her feelings.What impressed me most was his great responsibility for his work.What was once regarded as impossible has now become a reality．What surprised me most was that such a little girl could play the violin so well.Whatever the parents do is for their children.Whatever you say is of no use now.Whatever was said here must be kept secret.Which school will win the prize is not known.I read it in some book or other, does it matter which it was?Whichever you take will be yours.Whichever book you choose doesn’t matter to me.Whichever of us gets home first starts cooking.Whose relatives lost their life in the shocking earthquake hasn’t been announced.3.由关系副词when; where; why; how引导的主语从句.When the plane is to take off hasn’t been announced.Where the heroine went is not mentioned at the end of the story.Where the English evening will be held is still under discussion.Why he often comes here is known to us all.Why he didn't come here is not clear to anyone.Why the sun in the morning looks bigger than the sun at noon is very interesting.How he was successful is still a puzzle.How he managed to finish the composition in such a short time is still a mystery.How and why Einstein had come to Princeton, New Jersey is a story of struggle, success, and sadness.How much water is flowing can be measured easily. 水的流量是多少……主语从句的主谓一致问题①:单个的主语从句作主语,谓语动词用单数;如果两个或两个以上的主语从句作主语,谓语动词用复数.When and where he was born hasn’t been found.How and why he came to the lonely small island is still a mystery.When the person was murdered and why he was murdered are still unknown.When they will start and where they go have not been decided yet.②:what引导的主语从句,谓语动词可由表语来决定.What we need are women workers.What we need is more time and money.4.it作形式主语引导主语从句如果主语从句太长,为避免句子结构头重脚轻,我们可用it作形式主语,而把主语从句放在主句谓语部分之后.这样句子结构就更加平衡.此时主语从句的引导词一般是that(一般不省,亦可省略),也可以是其它引导词.▲It + be +形容词+ that-从句It’s(im)possible/probable/important/necessary/fortunate/certain/clear/obvious/likely/natural/ strange that…It is probable that he told her everything.It's strange that he didn't come yesterday.It is likely that there will be a storm tomorrow.主语从句中的虚拟语气:其中在it’s natural/important/ necessary/strange that…结构中,主语从句常用should +do的虚拟语气(美语中省去should).It was necessary that we (should) make everything ready ahead of time.It is important that every pupil (should) be able to understand the rule of school.It is natural that she should do so.It is essential that these application forms be sent back as early as possible.It is necessary that a college student ____at least a foreign language．（上海1993）A. mastersB. should masterC. masteredD. will masterAnswer：B▲It + be +名词+ that-从句It’s a pity/a shame/an honor/a fact/a surprise/a question/good news/no wonder/ common knowledge/high time that…It is a pity that you didn’t attend the lecture yesterday.It is a pity that she has made such a mistake.It’s no wonder that you’ve achieved so much progress.主语从句中的虚拟语气:其中在此结构中若为surprise, a pity, a shame, no wonder等表示惊奇、惋惜的名词时,主语从句常用should +do的虚拟语气(美语中省去should).若为advice, desire, demand, order, proposal, recommendation, requirement, suggestion等表示建议、请求、要求、命令等名词时,须用should +do的虚拟语气(美语中省去should).It is my proposal that he be sent to study further abroad.It’s a pity that I (should) miss the lecture.▲It + be + -ed 分词+ that-从句It’s said/reported/believed/thought/announced/decided/known to all /must be pointed out/must be admitted that…It is reported that the number of wild animals in Africa is decreasing.It’s announced that the hostages have been released.It’s decided that the meeting has been put off till next Monday.It’s known to us how he became a writer.其中在此结构中若为request, demand, require, beg, propose, suggest, recommend, advise, order, command, urge, desire等表示建议、请求、要求、命令等的动词,则主语从句中须用should +do的虚拟语气(美语中省去should).It is required that nobody (should) smoke here.It is desired that we（should）get everything ready this evening.It is suggested that we (should) hold a meeting next week.▲It +不及物动词+ that-分句It seems/appears/happens (to sb)/occurred to sb/turned out/doesn’t matter /make no difference that…It seems to me that you object the plan.It happened to me that I had been out when he called.It occurred to me that I forgot to shut the windows.It doesn’t matter whether he likes or not.It makes no difference that you will go today or tomorrow.常将seem, appear 等后的从句的否定转移到前面。
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。
名词性从句教案I、Teaching Objectives1. To review the definition and the classification of Noun Clause.2. To know about the key points of Noun Clause in National Entrance Examination.3. To know about the differences between “that” and “what”, and master the usage of the two words.II、Teaching difficult and important points1. The way to judge which clause the sentence includes.2. The differences between “that” and “what”, and master the usage of the two words. III、Teaching MethodExplanation, practise and conclusion ect.IV、Teaching procedures1 Definition:简单句并列句复合句在复合句中起名词作用。
名词可以在句中可放在主宾表同，那么把从句也放在主宾表同叫名词性从句。
包括: 主语从句(subject clause)、宾语从句(object clause)、表语从句(predicative clause)和同位语从句(appositive clause)e.g. That the earth turns around the sun is known to all. (subject clause)I want to know whether (if) he has passed the chemistry. (object clause)The trouble is that he has never done the work before. (predicative clause)The hope that he may recover is not gone yet. (appositive clause)一句话就是从句放在主宾表同的位置上从句可以是完整句也可以是不完整句考题回顾1. Teacher shows students some excises in NEMTa._______ you have done might do harm to other people.A. ThatB. WhatC. WhichD. Thisb. _____________ we’ll go camping tomorrow depends on the weather.A. IfB. WhetherC. ThatD. Wherec. Sarah hopes to become a friend of ______shares her interests.A. anyoneB. whomeverC. whoeverD. no matter whod. He asked ____ for a violin．A. did I pay how muchB. I paid how muchC. how much did I payD. how much I paide. ___ is a fact that English is being accepted as an international language.A. ThereB. ThisC. ThatD. Itf. --“The experiment had failed!” -- “I suggest you ___again.”A. tryB. tryingC. will tryD. would tryKey: BBCDDA2 名词从句的引导词通常有：1. 连词that, whether, if.2. 连接代词what, whatever, who, whoever, whose, which等3. 连接副词when, where, how, why主语从句1、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和连接代词what，who，which，whatever，whoever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。
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。
已成为固定结构。
如：a. It is +名词＋从句It is a pity that we can’t go. 很遗憾我们不能去。
b. It is ＋形容词＋从句It is clear that Tom has returned. 很显然汤姆已经回来了。
c. It is ＋过去分词＋从句It is said / reported / believed / known …1. That the earth is round is true. = It is true that the earth is round.2. Whether he will come hasn’t been decided. = It hasn’t been decided whether he will come.3. Who let out the news remained unknown. = It remained unknown who let out the news.4. Why he didn’t come here is not clear to anyone. = It is not clear to anyone why he didn’t come.5. How this happened is still a question.6. It is not clear when we will start.注意：连词that, whether在从句中不担任句子成分，只起连接作用，不能省略。
并且whether引导主语从句时不能用if代替。
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。
注意：who, which, how, when, where, why在所引导的主语从句中可担任主语，宾语，状语，不能省略。
可以用形式主语it引导。
注意：who, whom, which, what等可以和ever构成合成词，引导名从+让步状从。
此类主语从句不能用it引导，引导词在句中担任句子成分，不能省略。
= no matter X 只能引导让步状语从句注意：句中使用陈述句语序注意有和虚拟语气联系之处宾语从句宾语从句名词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.注意：1．介词后面的that不能省。
Pter is a good student except that he is sometimes careless.彼得是好学生，只是有时粗心。
2．主句谓语动词与that从句之间有插入语，that不可省略。
He said that, if he could manag it, he would come for dinner. 他说，如果他安排得好的话，他会来吃晚饭的。
3．宾语从句中有其他从属连词时，that不能省略。
He told me that if it was necessary they would work all night. 他告诉我如果需要的话，他们就干个通宵。
4.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：宾从和虚拟可以结合在demand、order、suggest、decide、insist, desire, request, command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。
