高中英语名词性从句详细讲解
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。
高中英语名词性从句知识讲解以及练习题 附答案
高中英语名词性从句知识讲解以及练习题附答案一、名词性从句概述名词性从句是一种充当名词作用的从句，通常在主句中作主语、宾语、表语或同位语。
它通常由引导词（如that, whether, if, who, whom, whose, which, what等）引导，并且从句中含有一个主语和谓语。
名词性从句的种类有很多，包括主语从句、宾语从句、表语从句和同位语从句等。
下面我们将逐一介绍这些从句。
二、主语从句主语从句作为一个名词，通常位于句首，是一个句子，主要作用是作为主句的主语。
引导主语从句的词：What (什么)；Whether (是否)；If (是否)；That (那个)。
例句：What he said is true. (他说的是真的。
)Whether it will rain tomorrow is uncertain. (明天是否会下雨还不确定。
)If you go, I will go too. (如果你走，我也跟着走。
)That he is coming is good news. (他来的消息是好消息。
)注意：主语从句的谓语动词通常要用单数形式。
What引导的主语从句通常用来表示“事物”的概念。
三、宾语从句宾语从句是一个名词，通常位于主句的动词后面，作为主句的宾语。
它可以由常见的宾语从句引导词引导，例如whether, if, that, who, whom, whose, what, when, where, how等。
引导宾语从句的词：Whether (是否)；If (是否)；That (那个)；Who (谁)；Whom (谁)；Whose (谁的)；What (什么)；When (何时)；Where (何处)；How (如何)。
例句：I know that he is coming. (我知道他要来。
)I wonder if he is telling the truth. (我想知道他是否说了真话。
高中英语名词性从句讲义(超详细版)
名词性从句一．定义：在句子中起名词作用的句子叫名词性从句 (Noun Clauses）。
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，名词性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。
1. His words are true. What he said is true.2. The dog sensed something good. The dog sensed that there was something good nearby.3. These are his words. These are what he said.4. My Maths teacher, Mr He, is a kind person. The news that the plane had crashed made us sad.二．引导名词性从句的连接词连词：在从句中不充当成分，只起连接作用 that, 无实义whether, if 是否as if \ as though 似乎，好像连接代词：有词义，在句中担任主语，表语，定语或宾语。
what, 什么 who, 谁whom, 谁，作宾语 whose, 谁的 which, 哪一个whatever, whoever……也可以引导。
连接副词：有词义，在句中担任状语。
when ,什么时候 where, 什么地方 why, 为什么 how ,怎么样how many, how much, how often三．主语从句1. 作句子主语的从句叫主语从句。
What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。
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。
That he is late for school makes the teacher very angry. 他上学迟到让老师很生气。
高中英语名词性从句详解
名词性从句—高中英语语法（1)表语从句ﻫ1. 定义：用作表语的从句叫做表语从句ﻫ2. 构成:关联词+简单句３．引导表语从句的关联词的种类：ﻫ（1）从属连词thaｔ。
如：ﻫThe ｔｒouble is thａt I haｖe loｓt hｉｓaddreｓs. 麻烦是我把他的地址丢了。
ﻫ(2）从属连词ｗhetheｒ, as, as if。
如:ﻫＨe ｌookｅd just as he had lookeｄｔen years befoｒe. 他看起来还与十年前一样。
ﻫＴhe questｉon is wheｔher thｅy wｉｌl ｂｅaｂle ｔｏhelｐｕs. 问题是他们是否能帮我们。
注:从属连词iｆ一般不用来引导表语从句，但as iｆ却可引导表语从句，如：All this waｓoveｒtｗenｔy yｅars ago, but it's aｓif it was onｌy ｙｅｓｔｅrdａｙ．ﻫ这都是２0多年前的事了，但宛如昨天一样。
ﻫ能跟表语从句的谓语动词一般为系动词ｂe, seeｍ，ｌook等。
如:Iｔlｏoｋed ａsｉf it ｗａs going to rain.看起来天要下雨了。
(3)连接代词who, ｗhoｍ, ｗhｏsｅ, what,which,whoｅｖer, wｈaｔeveｒ, ｗhichever连接副词where，ｗheｎ，how,ｗhy。
如：Ｔhｅprｏbｌeｍis who wｅcａn gｅt tｏｒepｌａce hｅr.问题是我们能找到谁去替换她呢。
Ｔhe quesｔion is hｏw hｅｄｉd it. 问题是他是如何做此事的。
ﻫThat wａｓwhat she dｉｄthis mornｉng on ｒeacｈinｇｔhe atｔic. 那就是她今晨上了阁楼干的。
解释:ﻫ１. 连词ｂecａuse可引导表语从句。
如:Ｉthiｎｋit is bｅcaｕｓe you arｅdoing too muｃh. 我想这是因为你做得太多。
(完整版)高中英语语法总结-名词性从句
名词性从句在句子中起名词作用的句子叫名词性从句 (Noun Clauses)。
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。
第一节知识点讲解顾名思义，主语从句在句子中作主语。
有时本身出现在主语的位置上，也有时出于句子结构的考虑退到句子的尾部，前面用形式主语 it 代替。
从句作主语时，谓语动词一般为单数形式。
如 :What I saw was beyond any verbal description.That his hair was turning grey worried him a bit.Why the company denied the contract is still unknown.When and where the government will build a city square is under discussion.It is pretty annoying that a small part of the machine is missing.It remains to be seen whether the new novel will be well received.Tips: 主语从句的 that 绝对不能省去。
因为句子是不能做主语的，故用 that 引导。
若去掉则没有了主语，而宾语从句的 that 可省。
主语从句： That he is right is known to all of us.宾语从句： We all know (that) he is right.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。
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.
高中英语语法---名词性从句详解
名词性从句详解名词性从句包括主语从句、表语从句、宾语从句、同位语从句。
其关联词有连接词that，if，whether；疑问代词who，what，which和疑问副词when，where，how，why等。
一.语法讲解1.主语从句主语从句在句中做主语。
它可以放在主句谓语动词之前，但多数情况由it作形式主语，而把主语从句放在主句之后。
例如：Who did that is known to all.It is interesting that you should like him.2.表语从句表语从句在句中作表语，位于主句中的系动词之后。
如：The question is who can complete the difficult task.表语从句不能用if引导，但可用as if引导。
例如：He looked as if he was going to cry．3.同位语从句同位语从句跟在名词后面，进一步说明该名词的具体内容。
引导同位语从句的名词主要有fact，news，promise，idea，truth等。
连接词用that（不用which），及连接副词how，when，where，why等。
例如：His delay is due to the fact that the car went wrong halfway．The news that our team has won the match is true.She asked the reason why there was a delay．4.宾语从句1.宾语从句在句中作及物动词或介词的宾语。
例如：We can learn what we did not know．He will talk to us about what he saw in the U.S.如果主句的谓语动词是及物动词make，find，see，hear等，则把宾语从句置于宾语补足语之后，用it作为形式宾语。
(完整版)高中英语名词性从句详解
(完整版)高中英语名词性从句详解名词性从句【名词性从句】相当于名词，可分别作主句的主语、表语、宾语和同位语。
因此，名词性从句分为主语从句、表语从句、宾语从句和同位从句。
宾语从句——在复合句中作主句及物动词的宾语，也可作介词或某些形容词的宾语1。
连接词从属连词that whether if 不担任成分只起连接作用关系代词who whom whose whatwhich既担任成分，又起连接作用。
主语,宾语或表语等关系副词when where why how 既担任成分，又起连接作用常担任状语◆I think (that） you will like the pictures。
◆ He has become what he wanted to be ten years ago。
◆ I don't know why Jane was late for school this morning。
◆The teacher is pleased with what she said。
◆I’m afraid that I can’t go to the party。
2.注意事项(that通常可以省略）。
但如从句是并列句时，第二个分句前的that 不可省。
◆He told me (that） he was ill and that he would not come to the party。
②陈述语序◆ I want to know what he has told you。
◆ She will give whoever needs help a warm support。
③注意宾语从句中的时态呼应。
当主句动词是现在时,从句根据自身的句子情况,而使用不同时态。
当主句动词是过去时态（could, would除外），从句则要用相应的过去时态,如一般过去时,过去进行时，过去将来时等；当从句表示的是客观真理，科学原理，自然现象，则从句仍用现在时态。
高中英语名词性从句详细讲解
名词性从句带有从句的复合句就是用连接词把主句和从句连接在一起。
高中英语中共有三大从句：形容词性从句（即定语从句）；二、名词性从句；三、状语从句。
形容词性从句即定语从句，相当于一个形容词，作先行词的定语，用来修饰前面的名词或代词的。
名词性从句相当于名词，可分别作主句的主语、表语、宾语和同位语。
因此，名词性从句分为主语从句、表语从句、宾语从句和同位从句。
主语从句、表语从句、宾语从句只有在主句句子的成分残缺时才可以考虑使用这三大从句。
同位语则是对前面某一名词的展开，即对前一名词的具体说明，做进一步解释，两者是同等，并不是定语从句的修饰与被修饰关系。
名词性从句考得最多的是宾语从句，其次是主语从句，再次是表语从句，而同位语从句则很少考查。
名词性从句的连接词:1.从属连接词：that（无任何词义），whether/if（均表示“是否”表明从句内容的不确定性），as if /as though （均表示“好像”“似乎”）。
以上词在从句中均不充当任何成分，只起连接作用。
根据句意，如果连接代词、连接副词、whether/if 和as if/as though都用不上时，才用that作连接词（因为that本身无任何含义）。
2.连接代词：what,who, whom, whose,which,whatever, whoever,whichever,whomever。
有词义，在从句中担任成分，如主语、表语、宾语、或定语。
从句一定要用陈述语序。
\3.连接副词：when,where,why,how, how many,how much,how often。
有词义，在从句中担任成分，作状语。
【注意】连接代词与连接副词既保留自己的疑问含义，又起连接作用，在从句中充当成分。
4.不可省略的连词：(1)介词后的连词；(2)引导主语从句和同位语从句的连词不可省略。
That she was chosen made us very happy.We heard the news that our team had won.（一）主语从句…第一部分：常规主语从句，即从句在复合句中充当一个主语。
完整版)高中英语名词性从句详解
完整版)高中英语名词性从句详解名词性从句可以作为主句的主语、表语、宾语和同位语。
它们分为主语从句、表语从句、宾语从句和同位从句。
宾语从句作为复合句中的主句及物动词的宾语，也可以作为介词或某些形容词的宾语。
它不担任成分，只起连接作用。
连接词可以是从属连词、关系代词、关系副词。
从属连词包括that、whether、if；关系代词包括who、whom、whose、what、which；关系副词包括when、where、why、how。
这些词既担任成分，又起连接作用。
宾语从句的例子有：I think (that) you will like the pictures。
He has e what he wanted to be ten years ago。
I don’t know why Jane was late for school this morning。
The teacher is pleased with what she said。
I'm afraid that I can't go to the party.在宾语从句中，由that引导的从句可以省略，但如果从句是并列句时，第二个分句前的that不可省略。
另外，宾语从句中的时态要与主句呼应，如果主句动词是过去时态，从句则要用相应的过去时态。
如果从句表示的是客观真理、科学原理或自然现象，从句仍用现在时态。
如果主语谓语动词为think、consider、suppose、believe、expect、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。
XXX。
It is often said that traveling broadens the mind。
I XXX I was determined to carry out the plan。
I consider it XXX。
高中英语语法 名词性从句详解
宾语从句的语序
和其他词性从句一样，宾语从句必须使用陈述语序， 不能用疑问语序。
How can I get to the station? Can you tell me →Can you tell me how I can get to the station 你能 告诉我怎样去车站吗？ What does he like? I wonder. →I wonder what he likes. 我想知道他喜欢什么。
Choose the right answer
1. I have no idea ____. a. what does this word mean b. what this word means c. what the meaning of this word d. what kind of a meaning is this word
because, why引导的表语从句
That‟s because he didn‟t understand me. 那是因为他没有理解我。（That„s because 强调原因） That‟s why he got angry with me. 那正 是他对我生气的原因。（That‟s why 强 调结果）
Define the following sentences
Exercise:
1. __ we shall be late is certain. a. when b. how c. why d. that 2. __ he says doesn‟t concern you. a. what b. how c. that d. which 3. It is not yet known __ he did. a. how b. that c. what d. when
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。
高中英语名词性从句详细讲解
6.条件状语从句 常用引导词:if, unless, We'll start our project if the president agrees. 7.让步状语从句 常用引导词:though, although, even if, even though The old man always enjoys swimming even though the weather is rough. 8.比较状语从句 常用引导词:as(同级比较), than(不同程度的比较) She is as bad-tempered as her mother. The house is bigger than ours. 9.方式状语从句 常用引导词:as, as if, how When in Rome, do as the Roman do. She behaved as if she were the boss.
Exercises
1_________ in the regulations that you should not tell other people the pass word of your e-mail account. .(2005 上海) A. What is required B .What requires C It is required D. It requires 2. The Foreign Minister said, “_______ our hope that the two sides will work towards peace.” (2006 北京) A. This B. There is C .That is D. It is 3.After Yang Liwei succeeded in circling the earth,_______ our astronauts desire to do is walk in space.(2004 上海) A .where B .what C .that D. how
高中英语名词性从句详细讲解
注意：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”。 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。
连接副词：when, where, how, why, whenever, wherever, however 有意义，在从句中担任状语
三、用法（Ⅰ）主语从句（在句中作主语） That she'll be present at the meeting has excited us. Whether they'll come or not is not sure. What he wants to tell us is not clear. Who'll win the game is still unknown. Where the English evening party will be held has not yet been announced. It has not been announced where... 注意：有时为了避免头重脚轻常用形式主语it代 替 主语从句放在句首，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， 常用句型如下：
宾语从句中用it作形式宾语
注意：如果主句中有形容词或名词作宾语补足 语时，一般用it来作形式宾语，把从句放在宾 补后面。 都是有那些词呢？ We think it our duty that we should help others. 我发现他两天之内完成工作是不可能的.
高中英语详细讲解名词性从句
Whatever is worth doing at all is worth doing well. 凡是值得做的就值得做好。
They ate whatever they could find o the deserted island. 他们在荒岛找到什么就吃什么。
We haven't yet settled the questio n where we are going t spend o ur summer vacation. 到哪儿去度暑假，这个问题我们还 没有决定。
It is a question how he did it. 那是一个他如何做了此 事的问题。
It sounds as if someone is knocking at the door. 听起 来好像有人在敲门。
C.because, why 引导的表语从句 I think it is because you are talking too much. 我想 这是因为你话说得太多。 That's because he didn' t understand me. 那是因为他没 有理解我。 三 、同位语从句 同位语从句用于对前面的名词作进一步解释，说明名词的具体内 容。同位语从句一般由 that 引导，但也可以由 whether 以及连接代 词和连接副词引导。 A.同位语从句一般跟在名词 fact, hope, idea, news, doubt, suggestion, information, opinion, decision, discovery, truth, promise, statement, problem, rule 等的面。 They were all very much worried over the fact that you were sick. 对你生病这件事，他们都很焦虑。 Where did you get the idea that I could not come 你在 哪儿听说我不能来? I have no idea whether he'll come or not. 我不知道他 是否来。
(完整版)高中英语名词性从句讲解
适用文档名词性从句解说在复合句中起名作用的从句叫做名性从句。
它包含主从句、从句、表从句和同位从句。
名性从句是中学段的一个重要法目，在年的高考取几乎都波及到，而且每年的命各有化。
解析届高考名性从句考的焦点主要有以下六个方面1.考名性从句的序2.考引 that与 what 的区3.考 it 在名性从句中作形式主或形式的用法4.考 whether 与 if 的区5.考名性从句中的疑+ever 引的名性从句与no matter+ 疑引的状从句的区6.考名性从句的虚气法重点解析一、名性从句主从句、表从句、从句、同位从句，在整个句子中所起的作用，相当于一个名。
所以，四种从句通称名性从句。
引名性从句的接可分三：接： that, whether, if（不充任从句的任何成分）接代： what, whatever, who, whoever, whom, whose, which.接副： when, where, how, why1.主从句作句子主的从句叫主从句。
主从句往常由附属that ，whether ，if和接代what ，who，which ，whatever ， whoever 以及接副 how， when， where， why 等引。
that 在句中无，只起接作用；接代和接副在句中既保存自己的疑含、又起接作用，在从句中充任从句的成分。
比如：What he wants to tell us is not clear.他要跟我什么，不清楚。
It is known to us how he became a writer.我都知道他是如何成一名作家的。
Where the English evening will be held has not yet been announced.英晚会将在哪里行，没有宣告。
有防止句子重脚，常用形式主it取代主从句作形式主放于句首，而把主从句置于句末。
主从句后的一般用数形式。
高中英语语法总结-名词性从句
名词性从句在句子中起名词作用的句子叫名词性从句(Noun Clauses〕。
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。
第一节知识点讲解顾名思义，主语从句在句子中作主语。
有时本身出现在主语的位置上，也有时出于句子结构的考虑退到句子的尾部，前面用形式主语it代替。
从句作主语时，谓语动词一般为单数形式。
如:What I saw was beyond any verbal description.That his hair was turning grey worried him a bit.Why the company denied the contract is still unknown.When and where the government will build a city square is under discussion.It is pretty annoying that a small part of the machine is missing.It remains to be seen whether the new novel will be well received.Tips: 主语从句的that绝对不能省去。
因为句子是不能做主语的，故用that引导。
若去掉则没有了主语，而宾语从句的that可省。
主语从句：That he is right is known to all of us.宾语从句：We all know (that) he is right.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。
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a. 引导主语从句并在句首时；b. 引导表语从句时；c . 引导从句作 介词宾语时；d. 从句后有“or not” 时；e. 后接动词不定式时。
Whether there is life on the moon is an interesting question.
4 Will you see to __C__ that the luggage is brought back?
A. we
B. yourself
C. it
D. them
表语从句
在复合句中作主句的表语.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
1.问题是我们和他已失去联系.
The problem is__th__a_t _w_e__h_a_v_e_l_o_st__to_u_c_h__w_i_t_h_h_i_m__. ___
1_________ in the regulations that you should not tell other people the pass word of your e-mail account. .(2005 上海)
A. What is required
B .What requires
It is necessary (important, natural, strange, etc.) that …
It is suggested (requested, proposed, desired, etc.) that…
注意 主语从句中的“主谓一致”：
1.主语从句通常被看作一个整体,主句的谓语动词用单数 形式.
The teacher told us that Tom had left us for America．
宾语从句中用it作形式宾语
注意：如果主句中有形容词或名词作宾语补足 语时，一般用it来作形式宾语，把从句放在宾 补后面。
We think it our duty that we should help others.
2.It + be + -ed分词 ＋ that从句
It is believed that…
人们相信…
It is known to us all that …. 众所周知…
It has been decided that…… 已经决定……
3.It + be + 名词 ＋ that从句
It is common knowledge that… …是常识
It is a surprise that ….
令人惊奇的是…
It is a fact that……
事实是……
4.It + 不及物动词 ＋ that从句
It appears that…
似乎…
It happens that ….
碰巧…
It occurred to me that…… 我突然想起……
另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：
名词性从句 noun clause
主语从句
subject clause
宾语从句
object clause
表语从句
predicative clause
同位语从句
appositive clause
请判断出下列的句子属于哪种从句
What I want to do is taking a bath. (主从)
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whether或if引导的宾语从句， 其主语和谓语的顺序也不能颠倒，
I know (that) he studied English last term.
I know (that) he will study English next year.
I know (that) he has studied English since 1998.
当主句动词是过去时态（could, would除外），从句则要用相应的 过去时态，如一般过去时，过去进 行时，过去将来时等；当从句表示 的是客观真理，科学原理，自然现 象，则从句仍用现在时态。例如：
We must never think (that) we are good in everything while others are good in nothing.
注意：在demand，order，suggest， decide，insist, desire, request, command, doubt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”。
The question is whether she should have a low opinion of the test?
Everything depends on whether we have enough money.
I wonder whether he will come or not.
我发现他两天之内完成工作是不可能的.
I find it impossible that he can finish the work in two days.
Exercises: “it”作形式主语或形式宾语：
1.I hate __A__ when people talk with their mouths full． A. it B. that C. these D. them
The news that they won the game spread the
whole school. (同位语从句) I don’t think he is an honest boy. (宾从)
The fact is that he stole the car. (表从) Do you know the fact that he stole the car?
主语从句
在复合句中作主语的从句.引导词有连 词that，whether; 代词：who, what ,which;副词：when ,where, how, why等.
1.That he is a famous singer is known to us. (It is known to us that he is a famous singer.)
(同位语从句)
Do you know the man who is standing over
there?
(定从)
It is said that they won the game. (主从)
引导名词性从句的连接词：
that（无意义，不可省，不充当任何 成分）
whether, if（均表示“是否”表明从 句内容的不确定性）
Can you tell me whether to go or to stay?
宾语从句中的“时态呼应”与“否定转移”
时态呼应
He told me that he __h_a_d_f_i_n_is_h_e_d_ his job. (已经完成了工作)
否定转移
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
as if ,as though（均表示“好像”， “似乎”）
以上在从句中均不充当任何成分
连接代词：what, whatever, who, whoever, whom, whomever, whose, which, whichever
连接副词：when, where, how, why, whenever, wherever, however
C .That is D. It is
3.After Yang Liwei succeeded in circling the earth,_______ our astronauts desire to do is walk in space.(2004 上海)
A .where B .what
2.这就是亨利怎么解决这个问题的.
This is__h_o_w_H__en_r_y__so_l_ve_d__th_e_p_r_o_b_le_m__. ___.
3.天看起来要下雨了.
It looks_a_s_i_f _it_i_s_g_o_in_g_t_o_r_a_in_.___________.
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 2. 引导主语从句和同位语从句的连
词不可省略。
That she was chosen made us very happy.
We heard the news that our team had won.
That they will come __i_s____certain.
2. What 引导主语从句时,主句谓语动词的单复数由 表语的单复数决定.
What he wants __a_r_e__these books. What he wants ___is___some water.