名词性从句讲解[1]

名词性从句1.从句的分类状语从句（分9种）从句主语从句名词性从句宾语从句表语从句同位语从句2.说明：①名词性从句的功能相当于名词，根据其在句中充当的成份，有不同的叫法。

②引导名词性从句的词语主要有：a.从属连词that，无词义，不作句子成分；b.从属连词if，whether（是否）有词义，但不作句子成分；c.从属连词as if（=as though，似乎、好像）有词义，但不作句子成分；d.连接代词who，whoever，what，whatever，whom，whomever，which，whichever，how much，how many有词义，作成分；e.连接副词when，whenever，where，wherever，why，how，however，how often，how soon，how far，how long作句子成分。

③在名词性从句中，要用陈述语序。

【例】1.I don’t kno w where does he live.(false)I don’t know where he lives.(true) 我不知道他住在哪。

2.What life in the future will be like is unknown.(true)What will life in the future be is unknown.(false)④不可用no matter who，no matter what等引导名词性从句，只能引导状语从句。

一、主语从句1.定义：若处在主语的位置上是个句子，那么这个句子就叫做主语从句。

2.注意事项：a.在主语从句中，任何引导词都不可以省去。

【例】That her hair is turning grey worries her.b.在主语从句中，不用if，用whether。

【例】Whether he will come or not is not clear.(true)If he will or not is not clear.(false)c.主语从句作主语时，谓语动词用单数。

高考名词性从句定义：在复合句中起名词作用的从句叫做名词性从句。

它包括主语从句、宾语从句、表语从句和同位语从句。

名词性从句的功能相当于名词词组, 它在复合句中担任主语、宾语、表语、同位语、介词宾语等。

高考对于名词性从句考查主要有以下七个方面：1.名词性从句的语序问题2. 引导词that与what的区别3. it在名词性从句中作形式主语或形式宾语的用法4. whether与if的区别5. 名词性从句中的疑问词+ever引导的名词性从句与no matter+疑问词引导的状语从句的区别6. 名词性从句中的虚拟语气问题7.易混句型的辨析，比如it作形式主语，主语从句后置的句型与强调句型，与定语从句、状语从句的辨析等。

语法要点一、名词性从句的连接词引导名词性从句的连接词可分为三类：连接词：that, whether, if, as if；that 无词义，在从句中不担任成分，只起连接作用，有时可省略。

if (whether), as if虽有词义，但在从句中不担任成分；连接代词：what, whatever, who, whoever, whom, whose, which，whichever. 连接副词：when, where, how, why有词义，在从句中担任成分，作状语；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。

不可省略的连词：1. 介词后的连词I can judge by what (=the things that)I know of him.She walked up to where he stood.2. 引导主语从句和同位语从句的连词。

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。

名词性从句I. !"#$%&一、定义名词性从句是在句子中起名词作用的句子。

它在复合句中能担任主语、宾语、表语、同位语，分别称为主语从句、宾语从句、表语从句和同位语从句。

二、分类&表语从句1) That is(系动词) a book.S + P 表语2) The fact is(系动词)that he has lied to usS + P 表语从句&宾语从句1) He said(vt) nothing at the meeting.S + P 宾语2) He said (vt) (that) he would help us without hesitation.S + P 宾语从句3) He is interested in (prep) what we want for breakfast.S + P 宾语从句&主语从句1) His mistakes made his teacher angry.主语+ P2) That he made so many mistakes made his teacher angry.主语从句P3)What he said made his teacher angry.主语从句P&同位语从句1) You can turn to my friend Tom for help.S + P 同位语2) The announcement that a new airport was to be built nearby made us excited.S 同位语从句+ P3) We heard the news that the war had broken out between America and Iraq.S + P 同位语从句三、引导词名称引导词在从句中担任成分连接词that, whether, if 不作成分连接代词what, whatever, who, whoever, whose, which, whichever 主语、宾语、表语、定语连接副词when, where, why, how, whenever, wherever, however 状语例如：a. He said that he would come.b. Whether he can pass the exam is not certain.c. He agrees with what I said.d. He agrees with what was said.e. I don’t know what present I should buy.f. That is where Tom used to live.g. That’s why he left.四、名词性从句语序名词性从句用陈述句语序。

名词性从句1. 种类2.宾语从句的时态。

3. that什么情况下能够省略，什么情况下不能够省略。

4. whether 和if 什么时候能够互换，什么时候不能够互换。

5. 如何区分同位语从句与定语从句。

完成以下题目，并分别指出它们是什么从句1.______ the baby could speak made his parents very happy.A. ThatB. WhatC. WhyD. If2. I wonder ______ you will go shopping or stay at home.A. thatB. ifC. whetherD. what3. This is ______ he was often late for school.A. whatB. thatC. whyD. whether4. We all know the truth ______ the earth ______ around the sun.A. if; movedB. that; movesC. why; moveD. whether; move一．名词性从句的概念：一个句子在连接词的引导下，在句子中起名词作用的句子叫名词性从句。

二．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。

His job is important. (主语)What he does is important. (主语)This is his job. (表语)This is what he does every day. (表语)I don’t like his job. (宾语)I don’t like what he does every day. (宾语)I don’t know about the fact that he is a teacher. (同位语)I don’t know about the man, Mr. White. (同位语)得出结论：所以根据它在句中不同的语法功能，名词从句又可分为四类，即：主语从句、宾语从句、表语从句和同位语从句。

名词性从句（知识讲解）名词性从句是相当于名词的句子在句中作主语、宾语、表语、同位语, 因此分别称为语从句、宾语从句、表语从句、同位语从句。

一、主语从句（一）引导主语从句的关联词有四类:1. that引导，that 不充当句子成分,没有词汇意义,在句首不省略That they were in truth sisters was clear from the facial resemblance between them.从她们相似的面容可以清楚地看出她们实际上是姐妹。

2. wheth er “是否”引导Whether he will come here is not clear.他是否会来还不清楚。

3.疑问词引导，有词义并在句子充当成分（1）疑问代词：what, which, who, whom, whoseWho will give the speech is not known yet. 谁要发言还不知道。

Who/Whom the prize will be given to is not decided yet. 奖要发给谁还不一定。

Whose room it is is not clear. 这是谁的房间还不清楚。

What he said at the meeting is not known yet. 他在会议上讲的什么还不知道。

Which (one) you like has nothing to do with me. 你喜欢哪个与我无关。

（2）疑问副词where, when, how, why，how many/much/old/long/far/often….Where the meeting will be held depends on the weather. 在哪里举行会议取决于天气。

When they are leaving is being discussed. 他们什么时候走还正在讨论。

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。

例如：It is a p ity that you didn’t go to see the film.It doesn’t interest me whether you succeed or not.It is in the morning that the murder took place.It is John that broke the window.2. 用it 作形式主语的结构(1) It is ＋名词＋从句It is a fact that … 事实是…It is an honor th at …非常荣幸It is common knowledge that …是常识(2) it is ＋形容词＋从句It is natural that… 很自然…It is strange that… 奇怪的是…(3) it is ＋不及物动词＋从句It seems that… 似乎…It happened that… 碰巧…(4) it ＋过去分词＋从句It is reported that… 据报道…It has been proved that… 已证实…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：It is said that President Jingo will visit our school next week. (right)That President Jiang will visit our school next week is said. (wrong)(3) It happens…, It occurs… 结构中的主语从句不可提前。