名词性从句语法总结归纳
篇一：高中英语语法总结-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:
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。被强调部分指人时也可用who/whom。例如： a) It is a pity that you didn’t go to see the film. 你不去看那场电影真可惜。
b) It doesn’t interest me whether you succeed or not. 我对你成功与否不感兴趣。
c) It is in the morning that the murder took place. 谋杀案是在早上发生的。（强调句型）
d) It is John that broke the window. 是John打碎的窗户。（强调句型）
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 that …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…
It appears that… 似乎…
(4) It ＋ 过去分词 ＋ 从句
It is reported that… 据报道…
It has been proved that…已证实…
It is said that… 据说…
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：
正确表达：It is said that President Jiang will visit our school next week.
错误表达：That President Jiang will visit our school next week is said.
（3）It happens/occurs…结构中的主语从句不可提前。例如：
正确表达：It occurred to him that he failed in the examination.
错误表达：That he failed in the examination occurred to him.
（4）It doesn’t matter how/whether …结构中的主语从句不可提前。例如：
正确表达：It doesn’t matter whether he is wrong or not.
错误表达：Whether he is wrong or not doesn’t matter.
（5）含主语从句的复合句是疑问句时，主语从句不可提前。例如：
正确表达：Is it likely that it will rain in the evening
错误表达：Is that will rain in the evening likely
4. what 与that 在引导主语从句时的区别
what 引导主语从句时在句时在从句中充当句子成分，如主语．宾语．表语，而that 则不然。例如：
a) What you said yesterday is right.
b) That she is still alive is a consolation
宾语从句就是在复合句中作宾语的名词性从句，通常放在主句谓语动词 (及物动词) 或介词之后。
1. 作动词的宾语
(1) 由that引导的宾语从句(that 通常可以省略), 例如：
I heard that be joined the army. 我听说他参军了。
(2) 由what, whether (if) 引导的宾语从句，例如：
a) She did not know what had happened. 她不知道发生了什么。
b) I wonder whether you can change this note for me. 我想知道你是否能帮我改一下笔记。
(3) 动词＋间接宾语＋宾语从句。例如：
She told她对我说她会接受我的邀请。
2. 作介词的宾语，例如：
Our success depends upon how well we can cooperate with one another. 我们的成功取决于我们之间的合作。
3. 作形容词的宾语，例如：
I am afraid (that) I’ve made a mistake. 我恐怕我已经犯了一个错误。
注意：that 引导的从句常跟在下列形容词后作宾语：anxious, aware, certain, confident, convinced, determined, glad, proud, surprised, worried, sorry, thankful, ashamed, disappointed, annoyed, pleased, hurt, satisfied, content 等。也可以将此类词后的that 从句的看作原因状语从句。
4. it 可以作为形式宾语
it 不仅可以作为形式主语，还可以作为形式宾语而真正的宾语that 从句则放在句尾，特别是在带复合宾语的句子中。 例如：
We heard it that she would get married next month. 我听说她下个朋就会结婚了。
5. 后边不能直接跟that 从句的动词
这类动词有allow, refuse, let, like, cause, force, admire, condemn, celebrate, dislike, love, help, take, forgive等。这类词后可以用不定式或动名词作宾语，但不可以用that引导的宾语从句。如：
正确表达：I admire their winning the match.
错误表达：I admire that they won the match.
6. 不可用that从句作直接宾语的动词
有些动词不可用于“动词＋间接宾语＋that从句“结构中，常见的有envy, order(命令), accuse, refuse, impress, forgive, blame, denounce（公开指责）, advise, congratulate等。例如：
正确表达：He impressed the manager as an honest man.
错误表达：He impressed the manager that he was an honest man.
7. 否定的转移
若主句谓语动词为think, consider, suppose, believe, expect, fancy（想象）, 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。例如：
I don’t think this dress fits you well. 我认为这件衣服不适合你穿。
三．【表语从句】
表语从句在复合句中作表语的名词性从句，放在系动词之后，一般结构是“主语＋连系动词＋表语从句”。可以接表语从句的连系动词有be, look, remain（留下、保持、依然）, seem等。引导表语从句的that常可省略。另外，常用的还有the reason is that… 和It is because 等结构。例如：
1) The question is whether we can make good preparation in such a short time.
2) This is why we can’t get the support of the people.
3) But the fact remains that we are behind the other classes.
4) The reason he is late for school is that he missed the early bus.
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。
1. 同位语从句的功能
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，例如：
1) The king’s decision that the prisoner would be set free surprised all the people.
2) The order that all the soldiers should stay still is given by the general.
2. 同位语在句子中的位置
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。例如：
He got the news from Mary that the sports meeting was put off.
3. 同位语从句与定语从句的区别
（1）. 同位语从句和定语从句相似，二者都有先行词。同位语从句是对先行词的进一步陈述，和先行词是同等的关系，含义相同。定语从句是对先行词的修饰或限制。
（2）. 同位语从句表示先行词的内容是什么，进一步说明先行词。定语从句与先行词之间是所属关系，表示“ …的 ” ，起修饰作用。
（3）. 同位语从句的“ that ” 不能省略。定语从句的关系代词“ that ” 在从句中作宾语时可以省略。
（4） 同位语从句的先行词是一个含有概念的抽象名词，从句对这一概念进行展开或说明。
1.正确使用同位语从句的关连词； 2.正确运用同位语从句的先行词； 3.能正确认识并正确翻译同位语从句。 同位语从句和定语从句比较练习
1. I heard about the news that he got a full mark in this examination.（同位语从句）
2. This is good news that I heard from Mary. （定语从句）
3. He can’t answer the question how he got the money. （同位语从句）
4. This is an easy question that he answered in class. （定语从句）
通过以上介绍，我们可以看出，四种名词性从句都需要有一个连接性词在从句的开头。这个词是什么性质，要看它在从句中作作的成分，如果作的是主语、宾语、表语的话，这个词就是连接代词；如果作的是各种状语，就叫连接副词；如果不作任何成分，就叫连接词。
引导名词性从句的连接词 ：
连接词 that, if, whether
连接代词： who, whom, what, whose, which, whichever, whatever, whoever
连接副词 when, where, how, why
第二节 考点分类解析
【考点一：语序问题】
名词性从句的语序：永远陈述语气。即名词性从句中不会出现助动词提前的现象。如：
Who he is doesn’t matter much.
When and where we shall have the sports meet is a question.
I don’t know what his name is.
I don’t know what is wrong with him. = I don’t know what is the matter with him.
You can’t imagine how excited I was at that time.
Can you tell me what size shoes you wear
No one can be sure ______ in a million years. （MET1991）
A. what will man look like
C. man will look like what B. what man will look like D. what look will man like
【考点二：that和what的区别问题】
能引导名词性从句的关系代词有who, whom, what, whose, which, whichever, whatever, whoever八个。为何单独讲what的用法呢？重要！在考试中出现的频率高！在本书第一章《定语从句》中，我们提到过，what是不能引导定语从句的。定语从句中如果缺少的成分是主语、宾语、表语，我们选择的是关系代词that或其他。现在山头换了，到了名词性从句的知识范围了。What在名词性从句中就很有用武之地了。还是分析成分，what 在从句中作的主语、宾语、表语。而that只是一个“连接词”，既不作什么成分，也没有什么意义。如:
What you did doesn’t agree with what you promised.
What he couldn’t understand was why his teacher was never satisfied with him.
The matter of salary is what I care most if I decide to change my profession.
What we can’t get always seems better than what we have already got.
I think that your composition is no better than his.
That you don’t love her is not my business.
What we have seen is different from _______.
A. we heardB. we have heard C. what we heard D. what we have heard
答案：D。我们应该可以看出这是个宾语从句。从句中hear是个及物动词，缺少宾语。所以，应该选有what引导的从句。而不能是that或者省略了that的情况。
I couldn’t agree with ______ at the meeting.
A. that you said B. which you said C. all what you said D. what you said
答案：Ｄ。与上一题相同，这也是一个考查宾语从句的题目。从句中的say是个及物动词，缺少宾语。所以，应该选择what引导的宾语从句。但是，这个题目最容易错的选项是Ｃ。 因为有些同学会认为all是先行词，而后面时what引导的定语从句。但是，what是不引导定语从句的。所以，Ｃ根本就是不存在的。
【考点三：that和whether的区别问题】
有时候，它们两个比较难以区别，因为，它们都是连接词，都在从句中不作成分。但是，它们之间最大的区别在于“意义”。即that在从句中既不作成分，也没有自己的意义；而whether就不同了。它虽然不在从句中作什么成分，但是它又意义，即“是否”。这就能够左右从句的意思，使从句所表达的意思变成一个还没有确定的因素。如：
I don’t know whether he can join us or not.
I’m sure that he can join us.
It is none of your business whether I love her.
It is none of your business that I don’t love her.
综上所述，区分that还是whether，重要一点就是看主句需要从句表达一个什么意思，是确定的.，还是不确定的；是事实还是疑问。前者选that，后者选whether。如：
I have no doubt _____ Mr. Johnson will make it here on time.
A. that B. whether C. why D. when
No one can be sure _____ the board will accept our conditions.
A. that B. whether C. why D. what
【考点四：if和whether的区别问题】
二者在引导宾语从句时都有“是否”之意。但并不是永远可以互换。一般认为，二者可以互换的环境也只有在宾语从句中。如：
He didn’t give us explicit reply whether/if he will attend our wedding ceremony.
篇二：高中英语语法重中之重-----名词性从句及时态总结
一，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。
一、引导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：
连词：that（无任何词意）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”）以上在从句中均不充当任何成分
连接代词：what, whatever, who, whoever, whom,whose, whichever,whomever
连接副词：when, where, how, why,how many,how much,how often
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.
比较：whether与if 均为"是否"的意思。 但在下列情况下，只可用whether：
1. whether引导主语从句并在句首2. 引导表语从句 3. whether从句作介词宾语4. 从句后有"or not"
Whether he will come is not clear.
大部分连接词引导的主语从句都可以置于句末，用 it充当形式主语。
It is not important who will is still unknown which team will win the match.
二. 主语从句
1、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。常用句型如下：
（1） It + be + 名词 + that从句（2）It + be + 形容词 + that从句（3）It + be + 动词的过去分词 + that从句（4）It + 不及物动词 + that 从句
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：It is necessary (important, natural, strange, etc.) that … It is suggested (requested, proposed, desired, etc.) that…
2、第一部分：常规主语从句，即句子在复合句中充当一个主语
主语从句的时态：不受主句的时态影响和限制。
（1）That he finished writing the composition in such a short time surprised us all.
（2）Whether we will go for an outing tomorrow remains unknown.
（3）Who will be our monitor hasn't been decided yet.
（4） Whom we must study for is a question of great importance.
（5）What caused the accident remains unknown.
（6）Whatever you did is right.
（7）Who the watch belongs to was lost is unknown.
（8）What we need is time.
（9）What we need are good doctors.
小结:（1)引导主语从句连词有that,whether,who,what,whatever等（2)连词位于句首不能省略
（3)主语从句大多数情况下视为三单,但也有例外,如例9
第二部分：为了防止句子头重脚轻，通常把形式主语it放在主语位置，真正主语搁置于句末
（1）It is certain that he will win the match.
（2）It is true that he has made a very important discovery in chemistry.
（3）It is very likely that they will hold a meeting.
（4）It is strange that he should do that.
（5）It is important that we all should attend the meeting.
（6）It is strange that the man should have stuck to his silly ideas.
（7）It is a pity that we won't be able to go to the south to spend our summer vacation.
（8）It is still a mystery what caused the accident.
（9）It is said that he has gone to shanghai.(=He is said to have gone to shanghai)
（10）It is known to all that the gun powder was first invented by the Chinese.
（11）It is suggested that the work should be done with great care.
（12）It seems that he has seen the film.(=He seems to have seen the film)
（13）It happened that the two cheats were there. (=The two cheats happened to be there)
小结:（1)以that 引出的主语从句,常以形式主语it引导. It is +形容词/名词/某些动词ed + that 从句.（2) 在有些that从句中要用虚拟语气 (should+do/should+have done)例句4,5,6,11.
3、主语从句的用法
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 pity that you didn’t go to see the film.
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 that …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 ＋不及物动词＋从句
It seems that… 似乎… It happened that… 碰巧…
(4) it is＋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.
(3) It happens…, It occurs… 结构中的主语从句不可提前。例如：
It occurred to him that he failed in the examination.
(4) It doesn’t matter how/whether …结构中的主语从句不可提前。例如：
It doesn’t matter whether he is wrong or not.
(5) 含主语从句的复合句是疑问句时，主语从句不可提前。例如：
Is it likely that it will rain in the evening
4. What 与that 在引导主语从句时的区别
What 引导主语从句时在从句中充当句子成分，如主语．宾语．表语，而that 则不然。例如： What you said yesterday is right.
三、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，但如从句是并列句时,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：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。
3. 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，仍保持陈述句语序。此外，whether与if 在作“是否”的意思讲时在下列情况下一般只能用whether，不用if：
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。例如：
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。 The question is whether she should have a low opinion of the test现在的问题是她是否应该有一个低意见的测试？ Everything depends on whether we have enough money. 一切要看我们
是否有足够的钱。I wonder whether he will come or not. 我想知道他来还是不来。 Can you tell me whether to go or to stay你能否告诉我是去还是留？
4. 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。例如：
he studies English every day. （从句用一般现在时）
he studied English last term. （从句用一般过去时）
I know (that) he will study English next year. （从句用一般将来时）
he has studied English since 1998. （从句用现在完成时）
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：The teacher told us that Tom had left us for America．
5. think, believe, imagine, suppose等等动词引起的否定性宾语从句中，要把上述主句中的动词变为否定式。即将从句中的否定形式移到主句中。例如：
We don’t think you are here. 我们认为你不在这。
I don’t believe he will do so. 我相信他不会这样做。
6.时态：1.主句用一般现在时，从句可用任意时态。2.主句用过去时，从句用过去某个时态。
3.主句用过去时，从句是客观真理时，只用一般现在时。
7.宾语从句的连接词
从属连词：连接宾语从句的从属连词主要有that,if,引导表示陈述句的宾语从句,而if和whether引导表示“是否”的宾语从句.
He told me that he would go to the college the next year他告诉我他明年上大学.
I don’t know if there will be a bus any more.我不知道是否还会有公交车.
Nobody knew whether he could pass the exam.没人知道他是否会通过考试.
连接代词：连接代词主要有who, whom ,whose ,what ,whoever ,whomever ,whosever, whatever, whichever等.连接代词一般指疑问,但what, whatever除了指疑问外,也可以指陈述.
Do you know who has won Red Alert game你知道是谁赢得了红色警报的游戏？
The book will show you what the best CEOs should know.
这本书会告诉你最好的执行总裁该了解些什么.
Have you determined whichever you should buy,a Motorola or Nokia cell phone
你决定好是买诺基亚还是摩托罗拉的电话了吗
连接副词：连接副词主要有when,where,why,how,whenever,wherever,however等.
He didn’t tell me when we should meet again.他没有告诉我什么时候我们能再见面.
Could you please tell me how you use the new panel你能告诉我怎么用这个新的操作盘吗None of us knows where these new parts can be bought.
没有人知道这些的新的零件能在哪里买到.
8.动词的宾语从句
大多数动词都可以带宾语从句
We all expect that they will win , for members of their team are stronger.
我们都预料他们会赢,因为他们的队员更强壮.
He told us that they would help us though the whole work.
他告诉我们在整个工作中,他都会帮忙的.
部分“动词+副词”结构也可以带宾语从句
I have found out that all the tickets for the concert have been sold out.
我发现这场音乐会的所有票都卖光了.
Can you work out how much we will spend during the trip
你能计算出这次旅行我们将花费多少钱吗
动词短语也可以带宾语从句
常见的这些词有:make sure确保 make up one’s mind下决心 keep in mind牢记
Make sure that there are no mistakes in your papers before you turn them in.
在上交试卷前确保没有任何错误.
可运用形式宾语it代替的宾语从句
①动词find,feel,consider,make,believe等后面有宾语补足语的时候,则需要用it做形式宾语而将
that宾语从句后置.
I think it necessary that we take plenty of hot water every day .我认为每天多喝开水是有必要的. I feel it a pity that I haven’t been to the get-together. 我没去聚会,感觉非常遗憾.
I have made it a rule that I keep diaries. 我每天写日记成了习惯.
We all find it important that we (should) make a quick decision about this mater.
我们都认为对这件事马上做出决定很重要.
②有些动词带宾语从句时需要在宾语与从句前加it
这类动词主要有:hate, take , owe, have, see to.
I hate it when they with their mouths full of food.我讨厌他们满嘴食物时说话.
He will have it that our plan is really practical.他会认为我们的计划确实可行.
We take it that you will agree with us.我们认为你会同意我们的.
When you start the engine, you must see to it that car is in neutral.
开启发动机时, 一定要使汽车的离合器处于空挡位置.
③若宾语从句是wh-类,则不可用it代替
We all consider what you said to be unbelievable.我们都认为你所说的是不可信的.
We discovered what we had learned to be valuable.我们发现我们所学到的东西都是有用的.
9.介词的宾语从句
用wh-类的介词宾语从句
We are talking about whether we admit students into our club.
我们正在讨论是否让学生加入我们的俱乐部.
The new book is about how Shenzhou 6 manned spaceship was sent up into space.
这本新书是关于神州6号载人航天飞船是如何升入太空的.
用that,if引导的介词宾语从句
有时候except,but,besides三个介词后可见到that引导的宾语从句
I know nothing about my new neighbor except that he used to work with a company.
对于我的新邻居我只知道他曾在一家公司上班,其他一无所知.
10.形容词的宾语从句
常用来引导宾语从句的形容词有: sure,certain,glad,please,happy,sorry,afraid,satisfied,surprised I am sure I will pass the exam.我确信我会通过考试.
I am sorry that I have troubled you so long.很抱歉我这么长时间在打扰你.
He is glad that Li Ming went to see him when he was ill.
他很高兴在他生病的时候李明能去看望他.
,whether在宾语从句中的区别
① if和whether在作“是否”解时,引导宾语从句常放在动词know,ask,care,wonder,find out等之后,介词后一般不用if② 少数动词,如:leave,put,discuss,doubt后的宾语从句常用whether.③ whether后可以加or not,但是if不可以.④ 在不定式前只能用whether.（如：I can’t decide whether to stay. 我不能决定是否留下。）⑤ 避免歧异时,我们常用whether而不用if.
12.哪些宾语从句不可以省略引导词that
1.当that作learn,suggest,explain,agree,wonder,prove,mean,state,feel,hold等动词的宾语时;2.当宾语从句较长时;3.当主语状语置于主句尾,宾语从句之前时;4.当主语谓语动词(包括非谓语动词)与宾语从句之间有插入语时;5.当一个动词带有两个或两个以上宾语从句时,此时第一个that可以省略,第二个that不可以省略;6.当宾语从句中的主语是this,that或this,that做主语的定语时;7.当宾语从句是双宾语中的直接宾语时;当宾语从句的主语是非谓语动词或主语从句时;8.当主语中的谓语动词是固定词组时;9.当宾语从句有it做其先行词时;10.在直接引语中,转述分句把宾
篇三：英语名词性从句知识归纳
名词性从句知识归纳
名词性从句是指在句子中相当于名词的从句，主要包括主语从句、宾语从句、表语从句和同位语从句。名词性从句不是修饰性从句，而是复合句中的主干。 （主语从句） I know . （宾语从句） The question is . （表语从句）
The fact is really a great problem. （同位语从句）
一、宾语从句---及物动词、介词、部分形容词（certain, sure, glad, afraid, frightened, happy, pleased, sad, sorry, surprised, upset, satisfied等）后
e.g. I believe (that不充当从句内的任何成分，一般情况可省略) I’m glad (that不充当从句内的任何成分) He doesn’t care (if/whether不充当从句内的任何成分) Please tell me (what充当从句内的宾语)
She always thinks of (how充当从句内的状语)
I don’t believe (whatever充当从句内的宾语，意为“任何事”) I’ll take to go. (whoever从当从句内的主语，意为“任何人”)
【宾语从句要点拓展】1. that引导宾语从句时一般可以省略，若由and或or连接两个宾语从句时，第一个从句中的that可以省略，而第二个分句前的that不可省略。
e.g. He told me and
2. whether和if引导宾语从句一般可以互换使用，但以下情况只能使用whether
(1) whether可与or not连用 e.g.
(2) 介词宾语从句要用whether e.g. I don’t care about
(3) that引导的宾语从句只能放于in, except, besides和but四个介词后
e.g. The Swede stood still, except
3. 转移否定---当主句是 I/ We think (believe, consider, expect, suppose, guess, imagine) 时，其后的宾语从句如果是否定形式，常把从句中的否定词not转移到主句中。 e.g. I don’t suppose 4. 时态问题---宾语从句的时态常受到主句时态影响，若主句是现在时或将来时，从句可用任何所需要的时态；若主句是过去时态，从句一般用过去的某种形式，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，则从句仍用一般现在时态。
e.g. I know
We believed
The teacher told us The teacher told us
5. 一种特殊类型的宾语从句---在这种句子里do you think等意为插入语，但实为主句，因此余下部分应用陈述语序
余下部分e.g. do you guess do you think
二、主语从句---位于句首，常用it做形式主语
e.g. 不充当从句内的任何成分，不可省略)
(whether不充当从句内的任何成分，不能用if)
(what充当从句内的宾语)
is still unknown. (who充当从句内的主语)
(where充当从句内的状语)
(whatever充当从句内的宾语)
is known to us(it为形式主语，代替how引导的主语从句)
【主语从句要点拓展】1. it做形式主语的结构
(1) It’s a pity/ a shame/ an honor/ a fact/ no wonder/ common sense/ good news that… 遗憾的是（荣耀的是、事实是、难怪是、常识是，好消息是……）
e.g. It is a pity
(2) It’s clear/ right/ true/ certain/ necessary/ (un) likely/ important/ (im) possible/ obvious/ remarkable that………很清楚（正确，必要，重要，可能，值得注意等) e.g. It is likely
(3) It is well-known/ reported/ recorded/ estimated/ said/ believed that…
众所周知（据报道，据记载，据估计，据说，据人们相信)…
e.g. It is said
(4) It turns out/ seems/ appears/ happens/ matters…) that…
结果是……（似乎是, 碰巧是, 重要的是……）
e.g. It happened (to me)
2. it做形式主语与it is(was)… that…强调句式的区分
e.g. It is a pity the murder took place.
解题方法：将it is/was… that 去掉，看余下部分是否完整，若完整即为强调句式；反之为it作形式主语。
三、表语从句---系动词后（常见系动词：be, look, remain, seem, appear等） e.g. The problem is .
The question isIt looks The question is What he wants to get is This is That is 四、同位语从句---抽象名词后（从句对抽象名词进行补充说明或解释说明抽象名词的内容） e.g. The news spread all over the world.
The thought came to him He must answer the question
I have no idea
名词性从句高考趋势与考察重点
一、语序问题---名词性从句内部一律使用陈述语序
注意以下句子：
e.g. I don’t know I have no idea Could you tell us
二、从句中的虚拟语气问题
1. 主语从句：
(1) It is important/ natural/ necessary/ essential/ strange/ that … (should) do…
(2) It is suggested/ advised/ demanded/ ordered/ requested that … (should) do… It is suggested 2. 宾语从句：在表示“命令、要求、建议、决定”等意义的动词后的宾语从句常用“（should）+ do”
【insist（坚持），order, urge, command（命令），require, request, demand（要求），advise, suggest, propose, recommend（建议）】
e.g. The commander ordered that
The doctor suggested that
3. 表语从句：当主句的主语为order, command, requirement, request, demand, advice, suggestion, proposal, recommendation等名词时，表语从句的谓语动词用“ (should) do”的形式。
4. 同位语从句：用于解释order, command, requirement, request, demand, advice, suggestion, proposal, recommendation等名词的同位语从句中常用“(should) do”结构 e.g. English teachers give advice 三、连接词的选择问题
1. doubt---doubt用于肯定结构时，后面用whether引导名词性从句；用于否定结构或疑问结构时，后面用 that 引导名词性从句。
e.g. I doubtI don’t doubt The doctor’s doubt is． I have no doubt
2. sure---be sure用于肯定句或疑问句时，后接 that 引导的名词性从句；用于否定句时，后接whether引导的名词性从句。
e.g. I’m sure Are you sure
I’m not sure 3. 主语是reason时，表语要用that引导而不是because：
e.g. The reason why he was late was 4. what和that--- that在从句中不充当成分，不含疑问意义，而what在从句中充当主语、宾语或表语，且含有疑问意义。
e.g. got the classmates laughing. helps him a lot in his job.
=5. 连接词wh-和wh-ever选择---前者表示一个特指概念，引导的名词性从句含有疑问意义； 后者表示一个泛指概念，意为“任何”，引导的名词性从句不含有疑问意义，相当于名词后加一个定语从句。
e.g. It was a matter of Sarah hopes to become a friend of
(=anyone who shares her interests.)
They will do
6. This/ That is why…和This/ That is because…
e.g. The reason why I came late is that my car broke down on the half way.
→He came late. That’s because his car broke down.
→His car broke down on the half way. That’s why he came late.
7. 几个特殊句型之间的转换 China has joined the WTO. （主语从句，it做形式主语） China has joined the WTO. （as引导的非限制性定语从句）（主语从句和表语从句）
四、it的问题
1. it做形式主语（注意与强调句式的辨别）
e.g. It was my fault
It is important 2. it做形式宾语
(V可以为make, find, feel, think, believe, consider , guess, suppose等) e.g. I think She has made clear 【固定结构】take it for granted that… 认为…是理所当然的
see to it that… 一定注意到…，务必…
I hate/ dislike it when…我讨厌…时… e.g. Some students take it for granted Will you please see to it
I hate it 五、同位语从句和定语从句的区分 e.g. The idea ．（同位语从句，that在从句中不充当成分，不可省略，从句具体说明idea的内容）。
The idea is wrong．(定语从句，that代替idea
The suggestion The suggestion 【名词性从句的解题思路】：高考中考查名词性从句时，经常考查连接词的选用。解题时应先判断从句的类型，然后判断从句是否缺少成分以及意义是否完整，最后根据引导名词性从句的连词的特点确定特定的连接词。
在从句中做put forward的宾语，that可以省略)。
