名词性从句讲解(2)
名词性从句讲解(最全版)
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。
名词性从句讲解
(2) It (so) happened that It seemed/appeared that It occurred to sb that It doesn’t matter whether/when…
（六）常见表语从句句型 1。 … is that/what/whether/where… 。 2. … look as if./as though
Let’s discuss the question when we shall set off f) 1. It is a surprise/an honour … that 2. It is clear/strange… that 3. It is (has been) proved/hoped/said/found/….that
（七）常见宾语从句句型 1. vt.+ that/what/where… 2.prep+ what/that/where… 3.(sb) be adj + that/what/where…
(2) Who/where…do you think sb do sth? Who/Where…do you believe sb do sth? Who/Where…do you suppose sb do sth? Who/Where…can you suggest sb do sth? Who/Where…can you imagine sb do sth? Eg. What do you think he will do soon?
(3) a. make/think/consider /feel/find b. it adj. it n. to do... doing ... that … c. take it for granted that…
名词性从句讲解及专项练习习题及解答
名词性从句讲解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。
一、名词性从句主语从句、表语从句、宾语从句、同位语从句，在整个句子中所起的作用，相当于一个名词。
因此，这四种从句通称为名词性从句。
引导名词性从句的连接词可分为三类：连接词：that, whether, if （不充当从句的任何成分）连接代词：what, whatever, who, whoever, whom, whose, which.连接副词：when, where, how, why1. 主语从句（两种结构，三类连接词）两种结构1.主语从句位于句首：What he wants is a book.Who kept the door open all night was unknown.2.主语从句位于句尾，it 作形式主语。
（1）It + be + 名词+ that从句It’s a pity that we can’t go. 很遗憾我们不能去。
It’s no surprise that our team should have wo n the game. 我们没赢这场比赛真意外。
（2）It + be + 形容词+ that从句.It seems obvious that we can not go on like this. 很明显我们不能这样下去了（3）It + be + 动词的过去分词+ that从句It is known to all that light travels in straight lines.众所周知光沿直线传播。
It is reported that China has sent another man-made earth satellite into orbit.（4）It + 不及物动词+ that 从句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 a pity (a shame, no wonder, etc.) that…It is suggested (requested, proposed, desired, etc.) that…三类连接词:1.连词that whetherthat引导的主语从句:引导词that无含义,在句中不做成分,不可以省。
高一英语《名词性从句》讲解
功能
例词
只起连接作 that, whether, 从属 用，不充当从 if，as if（只用 连词 句中的任何作 于表语从句） 用。
功能
例词
既起连接作用， Who,whom, 连接 本身又做从句 whose,what, 代词 的主语、宾语、 which 表语或定语。
功能
例词
when,where, 既起连接作用， 连接 why,how 本身又做从句 副词 的状语。
(1) They expressed the hope that they would come over to visit China again. (2) We all know the truth that the earth goes round the sun. (3) The fact that she had not said anything surprised all of us.
（1） 在whether or not结构中不可 用if代替whether
I don’t know whether or not he’ll come. I wonder whether it is true or not.
（2）介词后面的宾语从句用whether， 不用if
Everything depends on whether the situation will improve.（后面要讲 到介词后面的宾语从句）
3、It + be + 过去分词 + that从句 It is said that – clause
reported
thought hoped believed known
(1) It is said that he is the best student in the class.
名词性从句要点讲解
4. The problem is how we can
persuade the young men to stop smoking.
5.That is why he was late.
6.That is what he is worrying about.
7.That is where he was born.
fact, news, message, idea,
suggestion, question, order, problem, belief,thought等.
引导同位语从句的连词通常有 that/whether
例:
The fact that the majority voted for the man surprised many people.
was ready.
5)介词后不能用if.
It all depends on whether they will support us.
The old woman was interested in when and where Tom and Mary had their wedding party.
5、what\who\which + ever和
no matter + what\who\which的区：
①what\who\which + ever可引导名词性 从句和让步状语从句 Whoever breaks the rule must be p unished.
Whatever you do, you must do it wel
② no matter + what\who\which只能引 导让步状语从句。如： No matter who breaks the rule, h e must be punished.
名词性从句讲解(二)
1. We know the truth that the earth goes round the sun.
2. The fact that she had not said anything surprised all of us. 3. They asked me the question whether the work was worth doing. 4. They problem whether it is right or wrong has not yet been decided.
It is
a pity / an hounor a shame one’s duty that – clause no surprise no wonder
It is a pity that we can’t go.
It is no surprise that our team has win the game. It is no wonder that you have achieved so much success.
二、表语从句
1. This was what Tom was looking for.
这是汤姆正在找的东西。
2. That is why she was absent yesterday.
那是她昨天为什么迟到。
3. The house is where Lu Xun once lived.
这个房子是鲁迅曾今住过的地方。
4. This is how we overcame the difficulties.
这就是我们如何克服困难的。
5. The truth is that I have never been there.
英语名词性从句讲解【完整版】
2、I asked him if he could do me a favor .
If与whether的区别：
1、If不能引导放于句首的主语从句，而whether可以。 2、引导表语从句用whether，不用if。 3、引导同位语从句用whether，不用if。 4、whether可以引导从句作介词的宾语，不用if 。 5、whether or not 连在一起可以，但if不可以。而 “whether-----or not = if -----or not”
同位语从句：
定义：在复合句中充当同位语的句子。 同位语从句用来对其前面的抽象名词进行解释说明，被解释说明的词和 同位语在逻辑上是主表关系。 同位语常见名词：fact, suggestion, advice, idea, decision, news, thought, hope, belief, truth, doubt, promise, possibility, truth, warning, message, reason, report, question，explanation, wish, problem等。 常见的连接词：that, whether, what, who, how, when, where等。 用法： The thought that I want to buy my mother a birthday gift makes me excited.that 引导的同位语从句，解释说明 thought，从句不缺成 分 There is some doubt whether he will come. whether 引导同位语从句，if 不能引导同位语从句 we haven’t made the decision where we are going to spend our vacation. 有时同位语从句可以不紧跟解释说明的名词后面。 The news is surprising that he won the match.
牛津高中英语模块三Unit1_语法讲解和训练__名词性从句 2
模块三Unit1 语法讲解和训练名词性从句一、概述在句子中起名词作用的从句称为名词性从句。
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。
二、名词性从句的引导词1、连接代词：who, whom, whose, what, which, whoever, whatever等2、连接副词：when, where, why, how等3、从属连词: that, whether, if, as if, because (as if, because 只引导表语从句)连接代词和连接副词在句中不再是疑问词，因而从句中用陈述语序。
三、用法详解（一）主语从句1、主语从句用连接代词、连接副词和从属连词that, whether引导。
that不可省略。
That you don’t like him has nothing to do with me.Whether John can do the experiment remains a question.Who will be sent abroad to further his studies is not announced.What surprised me most was that such a little girl can play the violin so well.2、当主语过长时，常常用it作形式主语，而把真正的主语从句放在主句后面。
常用句型有：1)It +be +形容词（true, possible, certain, likely, surprising, strange, important…）+ that从句It’s certain that she will do well in the exam.It’s likely that he will tell me everything about that night.2)It +be +名词词组（no wonder, an honor, a pity, high time等）+that 从句It’s a pity that he can’t come.It’s high time that you turned in your homework.3)It +be +过去分词（said, reported, expected, supposed等）+that 从句It’s said that he is quite self-confident.It’s reported that a letter from the university has reached him.4)It +seem/ happen/look as if等+that从句tIt seems that Alice is not coming.It happened that I was a witness to the accident.5)It +doesn’t matt er(make no difference)+wh-It doesn’t matter whether you know my name or not.It makes no difference to me where we shall have the meeting.（二）宾语从句1、宾语从句用连接代词、连接副词和从属连词that, whether, if引导。
名词性从句
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。
名词性从句全面讲解
名词性从句全面讲解名词性从句是英语中的一种从属从句，它在句中充当名词的功能。
名词性从句可以在句子中作主语、宾语、表语和同位语等，并且可以由不同的引导词引导。
本文将全面讲解名词性从句的基本概念、用法及常见的引导词。
一、名词性从句的概念名词性从句是由一个词或一个词组引导的从句，它在句子中充当名词的角色。
名词性从句通常出现在复杂的句子中，起到连接主句和从句的作用。
名词性从句的引导词有很多种类，常见的有：that, whether, if, what, which, who, whom, whose, when, where, why等。
二、名词性从句的用法名词性从句可以在句子中作不同的成分，下面分别介绍其主要用法。
1. 名词性从句作主语名词性从句可以作为主语来引导句子，常用的引导词有：- That: That he is innocent surprises me.（他是无辜的让我吃惊。
）- Whether/If: Whether he will come or not is uncertain.（他是否会来还不确定。
）- What: What you said is true.（你说的是真的。
）2. 名词性从句作宾语名词性从句可以作为宾语来引导句子，常用的引导词有：- That: I know that he is a doctor.（我知道他是个医生。
）- Whether/If: I wonder whether/if it will rain tomorrow.（我想知道明天是否会下雨。
）- What: I don't understand what he is saying.（我不明白他在说什么。
）3. 名词性从句作表语名词性从句可以作为表语来引导句子，常用的引导词有：- That: The truth is that she is not happy.（事实是她不幸福。
）- Whether/If: The question is whether/if we should go or not.（问题是我们是否应该去。
名词性从句讲解及专项练习
名词性从句讲解及专项练习名词性从句又称为主语从句、宾语从句、表语从句和同位语从句，它在句子中充当名词的作用。
名词性从句通常由连接词引导，如that、whether、if、who、whom、which、what等。
主语从句主语从句作为句子的主语，在句子中起到强调、解释或说明的作用。
主语从句通常使用that引导，有时也可以用wh-词引导，但在口语中通常省略。
例如：- That she is a talented musician is well-known.（她是一位才华横溢的音乐家是众所周知的。
）宾语从句宾语从句作为句子的宾语，在句子中起到接受动作的作用。
宾语从句通常由that引导，也可以由wh-词引导。
例如：- She said that she was not feeling well.（她说她身体不舒服。
）- I don't know what she wants.（我不知道她想要什么。
）表语从句表语从句作为句子的表语，用来描述主语的状态、性质或特征。
表语从句通常由that引导，也可以由wh-词引导。
例如：- The important thing is that we all try our best.（重要的是我们都要尽力。
）- What matters is how you feel about it.（重要的是你对此是如何感受的。
）同位语从句同位语从句用来解释、说明或补充前面名词的内容，相当于同位语的作用。
同位语从句通常由that引导，一般不用wh-词引导。
例如：- I heard the rumor that they are getting married.（我听说他们要结婚的谣言。
）以上是对名词性从句的讲解，希望能帮助您更好地理解和应用名词性从句。
下面是一些专项练，请您根据句意选择合适的名词性从句填入空格中：1. Do you know ______ he is?3. I don't know ______ I should choose.4. The truth is ______ he lied to us.请在完成练后检查答案。
高考英语名词性从句讲解
高考英语名词性从句讲解一、概念：名词性从句相当于名词词组，在复合句中起名词性作用。
分类：主语从句、表语从句、宾语从句和同位语从句。
引导名词性从句的1）连接词：that, whether, if;2）关系代词：who, whom, whose, what, which, whatever, whichever;3) 关系副词：when, where, how, why.二、要点：人物主语：who, whoever what, whatever宾语：whom, whomever what, whatever名词性从句表语：whom what定语：which what whose状语when where why how whenever however wherever不做成份：that if/whether as if /as though三、基础知识学习：1主语从句: 主语从句是在复合句中代替作主语的名词, 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.that 引导的主语从句①句首That a round-trip to Mars would take more than a year and a half is estimated.That he misunderstood me is obvious.That引导主语从句，放句首，不做任何成分，不可省略。
②用形式主语it来引导句子A. that引导主语从句放句首时，有时会为了避免头重脚轻，保持句子平衡，常用it做形式主语，把真正的that引导的主语从句放句后。
It is strange that he made no answer.It is known to all that the earth is round.B. 用it做形式主语的主语从句结构注意：i. 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。
复习名词性从句(2)
复习情态动词1.It is usually warm in my hometown in March, but it _______ be rather cold sometimes.A. mustB. canC. shouldD. would2. -- Who’s the girl standing over there?-- Well, if you _______ know, her name is Mabel.A. mayB. canC. mustD. shall3.I promised to get there before 5 o’clock, but now the rain is pouring down. They _______ for me impatiently.A. may waitB.ought to waitC. could waitD. must be waiting4.The old lady _____ always sit for hour doing nothing, lost in thought.A. willB. wouldC. shouldD. could5.– We need a person badly to think up such an idea.-- _______ the new comer have a try?A. ShallB. MayC. CanD. Need6.Since nobody gave him any help, he ______ have done the research on his own.A. canB. mustC. wouldD. need7.Harry is feeling uncomfortable. He _________ too much at the party last night.A. could drinkB. should drinkC. would have drunkD. must have drunk8.– Why are your eyes so red? You ______ have slept well last night.-- Yeah, I stayed up late writing a report.A. can’tB. mustn’tC. needn’tD. won’t9.–What are you doing this Saturday?-- I’m not sure, but I ______ go to the Rolling Stones concert.A. mustB. wouldC. shouldD. might10.– I left my handbag on the train, but luckily someone gave it to a railway official.-- How unbelievable to get it back! I mean, someone __________ it.A. will have stolenB. might have stolenC. should have stolenD. must have stolen11.-I haven’t got the reference book(参考书) yet, but I’ll have a test on the subject next month.-- Don’t worry. You _______ have it by Friday.A. couldB. shallC. mustD. may12.You ________ have done better, but you didn’t try your best.A. canB. couldC. mustD. need13.It’s not cold today. You __________ have taken the thick sweaters out.A. needn’tB. mustn’tC. couldn’tD. may not14.Mr. White ________ at 8:30 for the meeting, but he didn’t show up.A. should have arrivedB. should arriveC. should be arrivingD. had arrived15.By law, half of Shylock’s property____ go to his daughter upon his death, and the other half to the city of Venice.A. shallB. canC. mustD.need16.He asked me for this book many times. Please tell him he ______ have it tomorrow.A. mustB. shouldC. shallD. would17.–Dad, would you buy me that new bike when my birthday comes?-- I ________, I promise.A. wouldB. shallC. shouldD. will18. Some people these days just _______ go out of their homes to contact the real world.A. mustn’tB. won’tC. mightn’tD. shouldn’t19.– You just think of yourself! You kept me waiting for at least three hours.-- I am sorry that you ________ think so.A. wouldB. couldC. shouldD. might20. Just be patient.You_______expect the world to change so soon.A.can’tB.needn’tC.may notD.will not复习名词性从句语法讲解：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，名词从句又可分为四类：主语从句、宾语从句、表语从句、同位语从句。
名词性从句综合典型例题讲解
名词性从句综合典型例题讲解从句是语法学家和教师说来都相当重要的一类语句，尤其是名词性从句（Noun Clause）在英语句子结构中具有重要作用，为了使读者更好地理解，本文主要就典型的名词性从句例题进行讲解。
1. 什么是名词性从句首先，我们必须弄清楚什么是名词性从句，它是一种可以独立使用的句子从句，它可以像名词一样在句子中作主语、宾语和它句等，但它必须由引导词和从句来表达意思，并且它们可以替代单一的名词成分，比如：That he will come tomorrow is certain.在以上句子中，That he will come tomorrow一个名词性从句，它可以替换名词certain来表达意思。
2.词性从句的常见引导词当出现名词性从句时，引导词总是先出现，它是由连词、疑问词和关系副词等组成的，如：what、that、when、why、whether、who、which、how等。
3.词性从句的示例通过上面的讲解，我们已经可以正确地识别出名词性从句，接下来将提供几个典型例题供大家参考：(1) What happened on the playground shocked the teachers.这是一个把what作为主语的名词性从句，其中what作为引导词，happened on the playground作为从句，本句的意思是“在操场上发生的事惊动了老师”。
(2) Who is coming to the party is still unknown.这是一个把who作为主语的名词性从句，其中who作为引导词，is coming to the party作为从句，本句的意思是“来参加派对的人还不清楚”。
(3) How to solve the problem has been puzzling them.这是一个把how作为主语的名词性从句，其中how作为引导词，solve the problem作为从句，本句的意思是“如何解决这个问题一直困扰着他们”。
名词从句讲解
名词性从句（一）●宾语从句宾语从句主要用于下面四种结构：1.主语＋谓语＋that从句The boy dreamed that he was flying to the moon.这种结构在英语中最为普遍，用于这种结构的动词也很多：say, think, insist, wish, hope, suppose, see, believe, agree, admit, deny, expect, explain, order, command, feel, dream, suggest, hear, propose, declare, demand, imagine, wonder, know, mean, notice, prefer, request, require, report...在believe, think, suppose等词后，连词that常省去。
在表示请求、命令、建议的等词后的宾语从句中要使用虚拟语气.2主语＋谓语＋wh-从句We must find out who did all this.在该结构中的宾语从句，实际上是一个特殊疑问句变化而来的。
而且特别需要注意的是，宾语从句是一个陈述句语序。
用于这种结构的动词常常是：see, say, tell, ask, answer, know, decide, show, find out, imagine, suggest, doubt, wonder, discover, understand, inform, advise...3.主语＋谓语＋whether(if)+从句I want to know whether(if)he will join us this afternoon.在该结构中whether(if)引导的宾语从句，实际上是由一个一般疑问句演变而来的。
意思是"是否"。
宾语从句要用陈述句语序。
一般说来，在宾语从句中whether与if可以互换使用。
名词性从句导入语法讲解(2)
B．比较
• 1.Bob is our teacher. • 2.What we need is more money. • 作主语可以是（一个）词，也可以是
（ 一个句 子 ）
• 1.I don’t know the answer • 2. I don’t know what the answer is • 作宾语可以是（ 一个 ）词，也可以说
• 2. The news that he couldn’t come to made us upset.
• 作同位语可以是（ 一个）词，也可以说 （ 一个句 子 ）
合作探究
你能总结出什么叫名词性从句和它的种类吗？
• 一、名词性从句简介
• 1．定义
• 在句子中起 名词性即主、宾、表、同位语 作用的从句称为 名词性从句.
• 1. China is no longer what it used to be. ___表__语_____从句
• 2. The truth that the earth turn around the sun is known to all.
______主_语______从句
• 3. It was snowing when he arrived at the station.
• 5. Where he has been is still a puzzle.
• 6. She had a feeling that she was being watched. • •
• 1 That he will succeed is certain.
Whether
•2
he will go there is not known.
whole school. _____同__位__语___从句
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名词性从句讲解（2 ）应城市第三高级中学刘琪一．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，表语从句位于系动词后，有时用as if引导。
1.that 引导表语从句，无词义，只起连接作用，不可省。
2.联系动词可为be,look,seem,sound,appear等。
3.主语可为名词fact,truth,cause,question,explanation,trouble,assumption,belief等，代词this,that,these,it等。
4.whether 引导表语从句The fact is that we have lost the game.That’s just what I want.This is where our problem lies.That is why he didn’t come to the meeting.It looks as if it is going to rain.China is not what it used to be.The question is whether the enemy is marching towards us。
【注意】1.当主语是reason时，表语从句要用that引导而不是because。
The reason why he was late was that he missed the train by one minute this morning.2.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。
3.That is why…译为“这就是……的原因”。
其中why引导的名词性从句在句中做表语，该句型通常用于针对前面已经说过的原因进行总结。
That is why you see this woman before you know.That is why I came.区别：①That is why ……与That is the reason why …同义，只不过从语法结构上讲，前者中的why引导表语从句，后者中的why引导定语从句。
That is (the reason ) why I cannot agree.②That is because …句型中从属连词because引导的名词性从句在此做表语，意为“这就是为什么……/因为……”。
That is because …指原因或理由。
That is why … 指由于各种原因所造成的后果。
He didn not see the film last night. That is because he had to help his little sister with her homework.He had seen the film before. That is why he did not see it last night. 二．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。
The news that we won the game is exciting.I have no idea when he will come back home.The thought came to him that Mary had probably fallen ill.（一）理解同位语从句的含义，把握同位语从句的实质同位语从句一般用that, whether，what, which, who, when, where, why, how 等词引导，常放在fact, news, idea, truth, hope, problem, information, wish,promise, answer, evidence, report, explanation, suggestion, conclusion等抽象名词后面，说明该名词的具体内容。
换言之，同位语从句和所修饰的名词在内容上为同一关系，对其内容作进一步说明。
The news that they had won the game soon spread over the whole school.（二）正确运用同位语从句的引导词，准确把握同位语从句1.如同位语从句意义完整，应用that引导同位语从句。
（即that 不充当任何成分，只起连接作用，不可省略）The general gave the order that the soldiers should cross the river at once.2.如同位语从句意义不完整，需增加"是否"的含义，应用whether引导同位语从句。
（if不能引导同位语从句）We'll discuss the problem whether the sports meeting will be held on time.3.如同位语从句意义不完整，需增加"什么时候"、"什么地点"、"什么方式"等含义，应用when, where, how等词引导同位语从句。
I have no idea when he will be back.I have no impression how he went home, perhaps by bike.4.当主句的谓语较短，而同位语从句较长时，同位语从句常后置。
The thought came to him that maybe the enemy had fled the city.5.表示“命令、要求、建议”的名词order, demand, suggestion等后接同位语从句时，从句的谓语要用虚拟语气，即“(should)＋动词原形”。
如：They mainly discussed the suggestion that a big dam (should) be built there。
（三）把握同位语从句和定语从句的区别同位语从句和定语从句相似，都放在某一名词或代词后面，但同位语从句不同于定语从句。
同位语从句对名词加以补充说明，是名词全部内容的体现，且名词和同位语从句的引导词均不在从句中作成分；定语从句说明先行词的性质与特征，与先行词是修饰与被修饰的关系，且名词和定语从句的引导词均在从句中作成分.区分时可以在先行词与与从句之间加一个系动词be,使之构成一个新句子，如果句子通顺且符合逻辑，则为同位语从句，反之，则为定语从句1. 从词类上区别同位语从句前面的名词只能是idea,fact,news,hope,belief,suggestion,proposal,word,thought,doubt,tru th,possibility,promise,order等有一定内涵的名词,而定语从句的先行词可以是名词,代词.如:We are not looking into the question whether he is worth trusting.The doctor whom you are looking for is in the room.His mother did all she could to help him with his study.2. 从性质上区别定语从句是从句对其先行词的修饰或限制,属于形容词性从句的范畴;而同位语从句是从句对前面抽象名词的进一步的说明和解释,属于名词性从句的范畴。
如:The news that our team has won the game was true.The news that he told me yesterday was true.I made a promise that if anyone set me free I would make him very rich.The mother made a promise that pleased all her children.3. 从引导词及其在句子中的成分上区别有些引导词如how, whether, what可以引导同位语从句,但不能引导定语从句That question whether we need it has not been considered.I have no idea what has happened to him.引导词that引导定语从句时,在从句中一般作主语或宾语(指物时还可以用which代替),并且作宾语时常常省略.that在同位语从句中仅起连接作用,不充当任何成分,并且不能省略,也不能用which来代替The order that we should send a few people to help the other groups was received yesterday.The order that we received yesterday was that we should send a few people to help the other groups.The report that he was going to resign was false.1）Information has been put forward ____ more middle school graduates will be admitted into universities.A. whileB. thatC. whenD. as2）It is said that more middle school graduates will be admitted into universities，this is the information ____ has been put forward.A. whatB. thatC. whenD. as巩固性练习：1. The fact ____ she works hard is well known to us all.A. thatB. whatC. whyD. which2. The news ____ he was kidnapped surprised us greatly.A. whatB. thatC. whyD. when3. His suggestion ____ the meeting be delayed was turned down.A. whichB. thatC./D. it4. I have no idea ____ he will start.A. whenB. thatC. whatD./5. I've come from the government with a message ____ the meeting won'tbe held tomorrow.A. ifB. thatC. whetherD. which6. The order ____ the prisoner be set free arrived too late.A. whichB. whetherC. thatD. what7. The nurses are trying their best to reduce the patient's fear ____he would die of the disease.A. thatB. asC. of whichD. which8. He often asked me the question ____ the work was worth doing.A. whetherB. whereC. thatD. when9. ____ she couldn’t understand was ____ fewer and fewer students showed interest in her lessons.A What; why B.That; what C. What; because D.Why; that10. The traditional view is ____ we sleep because our brain is “programmed” to make us do so.A. whenB. whyC. whetherD. that11. ___is no possibility ____Bob can win the first prize in the match.A. There; thatB. It; thatC. there; whetherD. It; whether12. ________ surprised me most was ________.A. That,that she spoke Japanese so wellB. What,how could she speak Japanese so wellC. What,that she spoke Japanese so wellD. That,why she could speak Japanese so well13.She took it for granted ________ I'd be back home an hour ago.A. thatB. whetherC. ifD. when14.We thought _______ strange that Tom did not come yesterday.A. thatB. itC. thisD. what15. As the day was fine, I made the suggestion ________ for a walk inthe park.A.we goB.we will goC.should we goD.that we go16. The true value of life is not in ________, but ________.A. how you get,that you giveB. which you got, what you giveC. what you get,what you giveD. what do you get,what do you give17.We think it possible ________ the local government will be able tosolve the housing problem.A. forB. thatC. whenD. how18.His success was because of ________ he had been working hard.A. thatB. the fact whichC.the fact thatD.the fact19..When changing lanes, a driver should use his turning signal to let other drivers know ______ .A. he is entering which laneB. which lane he is enteringC. is he entering which laneD. which lane is he entering20.It is not always easy for the public to see _______ use a new invention can be of to human life.A. whoseB. whatC. whichD. that21.It is still under discussion __________the old bus station shouldbe replaced with a modern hotel or not.A. whetherB. whenC.which D. where22. When the news came _____ the war broke out, he decided, to servein the army.A. sinceB. whichC.that D. because。