四种名词性从句讲解与练习
(完整版)名词性从句讲解及专项练习习题及其解答
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。
名词性从句是中学阶段的一个重要语法项目，在历年的高考中几乎都涉及到，并且每年的命题各有变化。
分析历届高考试题名词性从句考查的焦点主要有以下六个方面1. 考查名词性从句的语序问题2. 考查引导词that与what的区别3. 考查it在名词性从句中作形式主语或形式宾语的用法4. 考查whether与if的区别5. 考查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. 考查名词性从句的虚拟语气问题语法要点剖析一、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。
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。
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。
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。
2023年高中英语语法：名词性从句用法详解及强化练习分析
2023年高中英语语法：名词性从句用法详解及强化练习分析名词性从句分类简述名词性从句，就是指其作用相当于名词的从句，它包括主语从句、表语从句、宾语从句和同位语从句。
一、主语从句1. 引导词：主语从句就是在复合句中用作主语的从句，引导主语从句的引导词主要有三类：一是that;二是whether;三是那些可以用作疑问词的词语，如what, who, which, when, where, how, why 等。
如：That we shall be late is certain. 我们要晚了，这是确定无疑的。
What he says is not important. 他说的话并不重要。
Whether it will do us harm remains to be seen. 是否对我们有害还要看一看。
2. 形式主语：有时为了避免句子显得“头重脚轻”，可用it作形式主语放在句首，而把真正的主语放在句末。
如：It’s a pity that he didn’t come. 很遗憾他没来。
It was uncertain whether he could come or not. 他是否会来还不肯定。
这三句句首的it均为形式主语，相应的真主语分别是that he didn’t come / what she did / whether he could come or not。
二、表语从句表语从句就是在复合句中用作表语的从句。
一般说来，可用于引导主语从句的引导词也可用于引导表语从句，如that, what, who, which, when, where, how, why, whether等。
如：My idea is that we should do it right away. 我的意见是马上就干。
That is what he meant. 这就是他的意思。
The problem is how we can find him. 问题是我们如何找到他。
名词性从句详解及练习
各类从句详解英语从句可以分为名词性从句、定语从句和状语从句三大类：下面我们逐一进行说明：一、名词性从句（主语从句、表语从句、宾语从句、同位语从句）主语从句、表语从句、宾语从句和同位语从句在复合句中的充当的成分和其名称相同，分别作主句的主语、表语、宾语和同位语。
上述这四种从句均被称为名词性从句。
所有的名词性从句均不能用逗号分开，并且它们都用相同的关联词，关联词如下：①主从连词：that (无意义), whether (是否), if (是否)（在句子中不充当任何成分）②连接代词：who (谁), whom (谁), whose (谁的), what (什么), which (哪一个)③连接副词：when (什么时候), where (什么地方), how (怎样), why (为什么)主从连词只起连接作用，连接代词和连接副词除了起连接作用外，还充当从句某一个成分。
另外，可以用whatever, whichever, whoever, who(m)ever等连接代词引导名词性从句，来加强语气。
下面分别对各种名词性从句进行介绍（一）主语从句（subject clause）在主句中用作主语的主谓结构称之为主语从句。
例如：That he will come to the discussion is certain.他来参加讨论是确定的。
That the moon moves round the earth is well known to all of us.月球绕地球转动，这是我们大家都熟知的。
When the meeting is to be held has not yet been decide.会议什么时候召开还没有决定。
主语从句放在句首，句子常常显得比较笨重，因此通常可以把it放在句首，作形式主语，而将主语从句放在后面。
例如上面的句子可以分别改写为：It is certain that he will come to the discussion.It is well known to all of us that the moon moves round the earth.It has not yet been decide when the meeting is to be held.下面再举一些例句：What they are after is profit.他们追求的是利润。
名词性从句讲解归纳及例题
名词性从句讲解归纳及例题2011-06-29 09:14:00| 分类：Grammar 语法| 标签：|字号大中小订阅在主从复合句中，从句可以充当主句的主语、表语、宾语或同位语。
由于在多数情况下，主语、表语、宾语或同位语这四种句子成分由名词性词类充当，所以，我们把这些作用相当于名词的从句统称为名词性从句，把充当主语、表语、宾语或同位语的从句分别称为主语从句、表语从句、宾语从句或同位语从句。
也就是说充当什么成分就叫什么从句。
名词性从句由连接词（或关联词）引导。
常用的连接词有：连接词作用whether 是否that (本身无词义)只起连接词作用，引导从句，在从句中不作任何成分who, whom, whose which 哪一个what 什么，所…的在从句中分别作主语、宾语和定语在从句中分别作主语、宾语和定语在从句中分别作主语、宾语和定语cwhen什么时候，where什么地方how怎样、怎么，why为什么除了起连接词作用外，还在从句中作状语疑问词（who, whom, whose, what, which, where, why, when, how）可以引导主语、宾语和表语从句。
它们的特点是：1、疑问词有本身的词义；2、疑问词在从句中担当句子成分，如主语、宾语或状语；3、这种疑问词引导的从句一律用陈述语序，不能用疑问语序。
For example:Do you know whom they are looking for? 你知道他们在找谁吗？（宾语从句，陈述语序。
不能是whom are they looking for?）I don’t know who did it.我不知道这是谁干的。
（宾语从句。
在从句中如果疑问词作主语，其陈述语序和疑问语序一致。
）She asked me where I had been.她问我到哪儿去了。
（宾语从句。
陈述语序，不能是where had I been. 直接引语，间接引语。
专题20 名词性从句 (解析版)
高考英语一轮复习语法填空专题应对策略专题20 名词性从句学问网络考点考法1.功能1.作主语：主语从句：__________ he has got the scholarship is true.（答案为That）2.作宾语：宾语从句：Mr Li said __________the earth goes around the sun.（答案为that ）3.作表语：表语从句：My idea is __________we should do it right away.（答案为that ）4.作同位语同位语从句：I got the impression __________ you are unhappy.（答案为that）2.四种类型1)主语从句：1.that引导：__________Tom should cheat me is disappointing. （答案为That ）2.whether引导：__________ we’ll have a picnic hasn’t been decided. （答案为Whether）3.连接代词：__________ you need is a good long vacation. （答案为What）4.连接副词：__________ he arrives doesn’t matter. （答案为When）5.形式主语：It happened __________ she was out when we called.（答案为that）It is reported __________ ten people were killed in the explosion.（答案为that）2)宾语从句：1.that引导：He insisted __________ we (should) accept the gifts.（答案为that）2.whether /if引导：I doubt __________ he will come.（答案为whether /if）3.连接副词：She inquired __________ we are getting on. （答案为how）4.连接代词：He did __________ he could to comfort her. （答案为what）5.形式宾语：I find it strange __________ she doesn’t want to travel. （答案为that）I hate it __________ people talk about me behind my back. （答案为when）3)表语从句：1.that引导：The trouble is __________ we are short of money.（答案为that）2.whether引导：The question is __________ you will support me.（答案为whether）3.连接副词：That’s __________ you are wrong. （答案为where）4.连接代词：He is no longer __________ he used to be. （答案为what）5.其他：That’s __________ she spoke French so well. （答案为why）4)同位语从句：1.that引导：There is no doubt __________ he is guilty. (紧跟抽象名词后)（答案为that）The story goes__________ she got promoted.(与名词分开)（答案为that）He gave me some advice __________ I should read English every day.（答案为that）2.whether引导：There is some doubt __________ he will come. （答案为whether）3.连接副词: I have no idea __________ large the physical universe is. （答案为how）4.连接代词：The question __________ will replace him is still not clear.（答案为who）真题回顾语法填空：在空白处填入1个适当的单词。
高中英语名词性从句讲解与练习
名词性从句一、名词性从句的种类名词性从句一共有三种: that从句、whether(if)从句、疑问词所引导的从句；名词性从句具有名词的功能，可充当句子主语、宾语、表语、同位语，用名词性从句充当这几种成分，称为主语从句、宾语从句、表语从句、同位语从句。
二、that从句任何一个陈述句前面冠子that，即为that从句:He doesn't believe my words.(句子)→ that he doesn't believe my words.(名词性从句)He enjoys dancing.(句子)→ that he enjoys dancing(名词性从句)There is a lot of work to do.(句子)→ that there is a lot of work to do.(名词性从句)三、whether从句本从句系由一般疑问句演变而来。
1.问句有be动词时，主语与be动词还原，前面冠以whether(if):Is he happy?(句子)→ whether he is happy(名词性从句)(他是否快乐)2.问句有一般助动词(can、will、may、should、ought to、must、have)时主语与助动词还原，前面冠以whetherCan he do it?(句子)→ whether he can do it(名词性从句)(他是否能做这件事)Has he done it→ whether he has done it(他是否已做好此事)3.问句有do、does、did等助动词时主语与助动词还原，再将do、does、did去掉，后面的动词依人称和时态变化Did he come?(问句)→ whether he did come→ whether he came(名词性从句)(他是否来了) Does he like it?→→四、疑问词从句本从句系由疑问词( when what、how、where、why)等引导的特殊疑问句变化而成，这种由疑问词引导的问句称为特殊疑问句。
英语高中名词性从句练习题及讲解
英语高中名词性从句练习题及讲解在一个阳光明媚的午后，小明坐在窗边，手里拿着一本英语书，眼睛却望着窗外的蓝天白云。
他心里想，要是能把英语学得像家乡的方言一样溜，那该多好啊！突然，他的脑海中浮现出了一个奇妙的想法：用家乡的俚语来练习英语名词性从句。
这样既能增加学习的趣味性，又能加深对英语的理解。
于是，他拿起笔，开始创作起来。
1. 定语从句：小明的狗，它的名字叫做“旺财”，是村里最聪明的。
- 翻译：The dog of Xiaoming, which is named "Wangcai", is the smartest in the village.2. 主语从句：谁都知道，小明的英语成绩是班上最好的。
- 翻译：It is known to all that Xiaoming's English gradeis the best in the class.3. 宾语从句：老师经常告诉我们，学习英语没有捷径。
- 翻译：The teacher often tells us that there is noshortcut in learning English.4. 同位语从句：小明的梦想，那就是成为一名英语老师。
- 翻译：Xiaoming's dream, that is to become an English teacher.5. 表语从句：事实就是这样，小明的英语水平已经很高了。
- 翻译：The fact is that Xiaoming's English level isalready very high.小明一边写，一边忍不住笑出声来。
他想象着同学们用家乡话读这些句子的样子，一定很有趣。
他决定把这些练习题带到课堂上，让大家一起分享这份快乐。
老师走进教室，看到小明的练习题，也被逗笑了。
他决定把这些练习题加入到课程中，让全班同学都来练习。
就这样，小明的创意不仅让自己的英语学习变得更加有趣，也让整个班级的学习氛围变得更加活跃。
名词性从句用法讲解与专项练习题及答案
名词性从句用法讲解与专项练习题及答案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。
高考常从连接词的选择、语序、语气、时态等方面来考查。
名词性从句中的连接词有连词that / whether / as if，连接代词what / who/ which /whose / whatever / whoever / whomever / whichever，连接副词where /when /why / how / wherever / whenever。
第1讲引导名词性从句的连接词\考点1. 引导名词性从句的连接词有哪些有学生认为，引导同位语从句只能用that, 这句话对吗先看下面几个句子。
①I have no question that he will come.②I have a question whether he will come③I have a question when he will come.我们可以看出：上面三个句子中question后面都是同位语从句，都是说明question的内容的。
~在句①中，同位语从句的原句是陈述句，由that引导；在句②中，原句是一般疑问句，由whether引导；在句③中，同位语从句的原句是特殊疑问句，特殊疑问词也起着连接作用。
其实，所有名词性从句的连接词都有上面的三种情况。
宾语从句：I don’t know that he will come.I don’t know whether/if he will come.I don’t know when he will come.【表语从句：What I don’t know is that he will come.What I don’t know is whether he will come.What I don’t know is when he will come.主语从句That he will come is obvious.Whether he will come isn’t known yet.When he will come isn’t known yet.^1. 【2010浙江】It is uncertain ______ side effect the medicine will bring about, although about two thousand patients have taken it.A. thatB. whatC. howD. whether2. 【2012全国新课标】It is by no means clear ______ the president can do to end the strike.A. howB. whichC. thatD. what3. 【2012山东】It doesn’t matter ______ you pay by cash or credit card in this store.A. howB. whetherC. whatD. why4. 【2013陕西】It remains to be seen ______ the newly formed committee’s policy can be put into practice.]A. thatB. whichC. whatD. whether5. 【2009天津】It is obvious to the students ______ they should get well prepared for their future.A. asB. whichC. whetherD. that6. 【2012江西】It suddenly occurred to him ______ he had left his keys in the office.A. whetherB. whereC. whichD. that考点2. 引导词that的省略问题主语从句、表语从句、同位语从句中连词that不能省略。
高中英语名词性从句详细讲解与练习（附答案）
高中英语名词性从句详细讲解与练习在句子中起名词作用的从句叫名词性从句。
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，因此根据它在句中不同的语法功能，名词性从句又可分为主语从句、宾语从句、表语从句、同位语从句。
引导名词性从句的词叫做连接词，包括：1.连词（在名词性从句中只起连接作用，不作成分）2.连接代词（在名词性从句中作主语、宾语或表语）3.连接副词（在名词性从句中作状语）所有的名词性从句的语序都是陈述语序。
I主语从句：是在主句中作主语的从句。
它由连接词引导，通常位于谓语动词之前。
连接词：1.连词：在从句中不充当任何成分，常见的引导主语从句的连词有that, whether oThat he got the first prize excited him much.他获得一等奖一事使他非常兴奋。
It is doubtful whether we can get there on time.我们能否按时到达那儿还不确定。
D that引导的主语从句:在从句中不作任何成分，也没有实际意义。
一般情况下that不可省略。
That light travels in straight lines is known to all.众所周知，光沿直线传播。
That you don't like him is none of my business.你不喜欢他不关我的事。
2）whether引导的土语从句:常置于句首，表示“是否”之意；if一般不引导主语从句。
Whether he can finish his task on time is of greatimportance.他是否能按时完成任务非常重要。
Whether you can succeed or not depends on howhard you work at it.你能否成功取决于你努力的程度。
2.连接代词：在从句中起名词或代词的作用，常作从句的主语、宾语、表语或定语,有具体意义且不能省略。
737编号高中名词性从句讲解及练习
名词性从句主语从句，表语从句，宾语从句和同位语从句在复合句中的作用相当于名词，因此这四种从句统称为名词性从句。
这四种从句与主句间不用逗号。
一．名词性从句连接词的选用可分为三类：1.that在名词性从句中只起连接作用，不充当成分，也没有实际意义。
That he will come is certain.I think that he’ll be all right in a few days.The fact is that I have never been there.The fact that she had not said anything surprised all of us.2.whether/if 在名词性从句中有“是否”之意，但不充当成分。
附Whether/if区分：在宾语从句中可互换，但介词和discuss后的宾语从句用whether; 其它名词性从句用whether；可以说whether to do 但不能说if to do ;可说whether / if……or not, whether or not ，不能说if ornot.Whether she’s coming or not doesn’t matter too much.I wonder whether/ if it is true.The question is whether it is worth doing.They asked me the question whether the work was worth doing.I don’t know whether or not they will come.(不能用if or not)I don’t’ know if / whether they will come or not.另外别忘了if可引导条件状语从句。
试比较：Please let me know if you want to go.Please let me know whether you want to go.3.其它连接词的选用遵循：“缺什么，补什么”的原则。
名词性从句详细讲解及练习题
名词性从句详细讲解及练习题高中英语从句大全一．名词性从句起名词性作用的从句叫名词性从句英语当中其名词性作用的成分有主语，宾语，表语，同位语，当这些成分有一个句子来代替就构成了名词从句，主要有主语从句，宾语从句，表语从句，同位语从句。
1.表语从句1.定义：用作表语的从句叫做表语从句。
（be动词,四“变得”：become, get,turn，go；感官动词look,, smell,sound，taste，feel；及grow, turn out，appear，keep等）引导表语从句的词有从属连词that、whether、as though(if)；关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever 等；关系副词when, where, why, how, however, whenever, wherever等。
可以接表语从句的连系动词由be, look, remain, seem等。
The trouble is that we are short of money.That is why stone walls are used instead of fences around New England fields.At that time, it seemed as if I couldn't think of the right word anyhow2、由从属连词that，whether引导的表语从句。
that在引导表语从句时无词义，在口语中，间或可以省略。
而whether有词义，意为、“是否”。
这时主句的主语常常是些抽象名词，如question，trouble，problem等。
表语从句对主句主语进行说明、解释，使主语的内容具体化。
The trouble is that I have lost his addressThe question is whether they will be able to help us.问题是他们是否能帮我们。
(完整word版)高中英语语法：四种名词性从句讲解与练习
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，名词性从句可分为主语从句、表语从句、宾语从句和同位从句。
引导词：主语从句就是在复合句中用作主语的从句，引导主语从句的引导词主要有三类：一是that；二是whether；三是那些可以用作疑问词的词语，如what, who, which, when, where, how, why等（一）引导名词性从句的连接词1、连接代词：who, whose, whom, what, which。
有词义，在从句中担任成分，如主语、表语、宾语、或定语等。
2、连接副词：when, where, why, how。
有词义，在从句中担任成分，作状语。
3、连接词：that, whether, if, as if。
that 无词义，在从句中不担任成分，有时可省略；if (whether), as if虽有词义，但在从句中不担任成分。
注意：连接代词与连接副词在句中不再是疑问句，因而从句中谓语不用疑问式。
连接代词与连接副词在从句充当句子成分，连接词whether 和if（是否），as if（好象）在从句中不充当句子成分，只起连接作用。
根据句义，如果连接代词与连接副词，whether、if 和as if都用不上时，才用that作连接词（that本身无任何含义）。
一、主语从句与宾词从句连词、语序、时态相同。
只是不能用if, that 不可省；（一）、主语从句是一个句子，在句子中作主语成分。
（二），主语从句的特点1.与宾语从句使用同样的连接词，只是if 不能用；1）、陈述句用that。
2）、一般疑问句用whether。
3）、特殊疑问句用特殊疑问词what, which, who,when, where, why, how 等词引导。
2.经常隐身（以it为形式主语出现）。
例句：1.It's true that the earth is round.That the earth is round is true.2. 表是否的意思时，不能用if代替whether.It hasn't been decided whether he'll come or not.Whether he'll come or not hasn't been decided.3. 从句语序为主谓宾正常语序。
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。
高中英语名词性从句知识点含练习
高中英语名词性从句知识点（含练习）基础回顾1.表语：表语用来说明主语的身份、性质、品性、特征和状态的，表语常由名词、形容词、副词、介词短语、动词的-ing、不定式、从句来充当，它常位于系动词(be, become, appear, seem,look,sound,feel,get,smell等词)之后。
如：Her job is selling computers. 此句表语为selling computers如果句子的表语也是由一个句子充当的，那么这个充当表语的句子就叫做表语从句。
2.同位语：一个名词(或其它形式)对另一个名词或代词进行解释或补充说明，这个名词(或其它形式)就是同位语。
如Mr. Smith,our new teacher,is very kind to us. 我们的新老师史密斯先生对我们很好。
Mr.Smith是主语our new teacher的同位语，指同一人。
同位语从句I heard the news that our team had won．我听到了我们队获胜的消息。
that our team had won 解释news的具体内容，是同位语正文一、定义在复合句中具有名词的性质的作主语、表语、同位语、宾语的从句叫名词性从句。
因此，我们把主语从句、表语从句、同位语从句和宾语从句这四种从句统称为名词性从句。
That he finished writing the composition in such a short time surprised us all他在很短的时间内写完作文让我们都很惊讶 (主语从句)The trouble is that she has lost his address. 麻烦的是她把他的地址搞丢了。
（表语从句）They have no idea at all where he has gone. 他们不知道他去什么地方了。
（同位语从句）Do you remember how he came? 你记得他怎么来的么？（宾语从句）二、语序名词性从句要采用陈述句语序。
名词性从句讲解归纳及例题
名词性从句讲解归纳及例题在主从复合句中，从句可以充当主句的主语、表语、宾语或同位语。
由于在多数情况下，主语、表语、宾语或同位语这四种句子成分由名词性词类充当，所以，我们把这些作用相当于名词的从句统称为名词性从句，把充当主语、表语、宾语或同位语的从句分别称为主语从句、表语从句、宾语从句或同位语从句。
也就是说充当什么成分就叫什么从句。
名词性从句由连接词（或关联词）引导。
常用的连接词有：注意：1.它们的特点是：1、疑问词有本身的词义；2、疑问词在从句中担当句子成分，如主语、宾语或状语；3、这种疑问词引导的从句一律用陈述语序，不能用疑问语序。
Do you know whom they are looking for?I don’t know who did it.She asked me where I had been.Can you tell me when the train will arrive?I don’t know why he hasn’t come yet.He didn’t tell me what you were doing.What you have done might do harm t other people.I don’t know where he is now.Where he went for his weekend is not known.What I want to know is where he has gone for his weekend. 2.做名词性从句的题的三大步：一分，二划，三看，即一分句子结构，二划从句类型，三看句意完整否。
下面我们再分别讲述主语从句、宾语从句、同位语从句和表语从句。
一、主语从句1．that 引导主语从句时，that 没有意义，但不能省略。
（that 引导宾语从句时可以省略。
）That she is a rich woman is known to us all. 众所周知，她是个富有的女人。
名词性从句讲解及专项练习习题及其解答
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。
语法要点剖析一、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。
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 a pity (a shame, no wonder, etc.) that…It is suggested (requested, proposed, desired, etc.) that…2. 宾语从句名词句用作宾语的从句叫宾语从句。
(完整版)高中名词性从句全面讲解及练习(含答案)
高中英语讲义---- 名词性从句（主从、表从、宾从，同从）1，陈述句做名从用连词that + SV, that 表主句肯定从句完整，不做成分。
主从可用it 做形式主语，宾从第一个that 可省略。
You study hard.主从：That you study hard is known to us.= It is known to us that you study hard.表从：My opinion is that you study hard .宾从：I think (that) you study hard. …and that (不能省略)….同从：My opinion that you study hard is known to us. *比较同从和主从！●一般抽象名词后对其进行解释和说明的完整句子就是其同位语从句，不完整就是定语从句。
I appreciate your idea that we have an exam every week. （that后完整—同从）I appreciate your idea that you came up with last time.（that后不完整---定从）2，一般问句做名从用连词whether(是否) + SV，whether表主句不肯定从句完整，宾从中可用if（介词后或宾从后有or not时只用whether）。
Does your friend like English ?主从：Whether your friend likes English isn’t clear .=It isn’t clear whether your friend likes English.表从：My question is whether your friend likes English.宾从：I don’t know whether/ if your friend likes English.同从：My question whether your friend likes English isn’t clear.3, 特殊问句做名从用疑问词（连词）+ SV, 疑问词做主语时直接+谓语。
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四种名词性从句（宾语从句、主语从句、同位语从句、表语从句）讲解与练习学习宾语从句学习宾语从句的连词、语序、时态和各种变化及特殊用法（直接引证变间接引语也在宾语从句的基础上还要进行人称、状语、少数动词和句型的变化)是为学习其它三种名词性从句（主从、表从、同位从）做铺垫，连词、语序、时态基本相同，只是后三种考点相对宾语从句少的多，主要是对连词的应用进行考查。
所以学好宾语从句是必要的。
宾语从句三注意三特殊一注意：注意引导词（连词）由陈述句转化而来的宾语从句，引导词为that，that在口语或非正式文体中可省略；由一般疑问句转化而来的宾语从句，引导词为if或whether；由特殊疑问句转化而来的宾语从句，引导词为句子本身的特殊疑问词，即what，when，where等。
例如：Tom says (that) he will fly to Beijing tomorrow. 汤姆说他明天将要坐飞机去北京。
He asked me if / whether I know his name. 他问我是否知道他的名字。
I want to know where you went yesterday. 我想知道你昨天去哪儿了。
二注意：注意从句语序宾语从句的语序应该为陈述句语序，即“主语+谓语+宾语+其他”。
也就是说，将疑问句转化成宾语从句时，一定要将疑问句语序转变成陈述句语序。
例如：Can you tell me what he is doing? 你能告诉我他正在做什么吗？<特别提醒> 当疑问句在宾语从句中做主语时，语序不变。
例如：Do you know what makes him so angry? 你知道什么事使他如此生气吗？I don’t know what is wrong with her.我不知道她出什么事了。
三注意：注意从句时态主句为一般现在时态，则宾语从句根据实际情况用任意的时态；但主句为一般过去时态时，宾语从句则要用过去的相对应的某种时态。
例如：She tells me that she will come by train. 她说她将要坐火车来。
She told me that she would come by train. 她说她将要坐火车来。
<特别提醒> 如果宾语从句表示的是客观真理或是科学事实，其谓语动词仍用一般现在时态。
例如：Our teacher told us that the sun is much bigger than the moon.老师告诉我们说太阳比月球大得多。
习题：（1）I don’t know ___________or not．A．whether he is at home B．if he is at homeC．that he is at home D．whether is he at home（2）This depends on _________ the weather is fine．A．which B．whether C．if D．that（3）The teacher asked the new student ________ class he was in．A．which B．where C．if D．that（4）I don’t know ________ Mr．Green will come to see us．He’ll help us with our English．A．why B．when C．how D．where（5）－－－Be careful！Don’t break the bottles．Do you hear ______ I said? David?－－－Yes，MumA．what B．that C．why D．if类型二：宾语从句的语序——陈述句语序（1）Did you find out ______?A．she was looking for whose child B．whose child was she looking forC．whose child she is looking for D．whose child she was looking for（2）Are you interested in _____?A．how did he do it B．he did it how C．how he did it D．he how did it （3）I don’t know _____．Can you tell me?A．how the two players are old B．how old are the two playersC．the two players are how old D．how old the two players are（4）－－－What did the scientist say?－－－He said he wondered if _____ into space by spaceship one day．A．he had to fly B．he could fly C．can he fly D．could he fly（5）Excuse me，sir．Could you tell me ____?A．Where the bank nearest B．where is the nearest bankC．where the nearest bank is D．the nearest bank is where类型三：时态（1）It’s 7：30．I can’t believe you___ cooking dinner yet，Sally．A．haven’t started B．didn’t C．don’t start D．hadn’t started（2）The teacher told us yesterday that December 25 ____ Christmas Day．A．is B．was C．has been D．will be（3）The teacher said that the earth _______round the sun．A．goes B．go C．went D．will go（4）We ’d like to tell you that you ______the exam．A．have passed B．had passed C．pass D．will pass（5）“Could you tell me______?” “ Yes．They ____ to the library．”A．where are the twins，have been B．where were the twins，have beenC．where the twins are，have gone D，where the twins were，have gone类型一：ABABA类型二DCDBC类型三AAAAC主语从句（与宾词从句连词、语序、时态相同。
只是不能用if, that 不可省；考点相对简单，考连词和时态。
所以只要理解了句子的结构和意思，连词很容易就能填出来)。
（一）、主语从句是一个句子，在句子中作主语成分。
（二），主语从句的特点1.与宾语从句使用同样的连接词，只是if 不能用；1）、陈述句用that。
2）、一般疑问句用whether。
3）、特殊疑问句用特殊疑问词what, which, who,when, where, why, how 等词引导。
2.经常隐身（以it为形式主语出现）。
例句：1.It's true that the earth is round.That the earth is round is true.2. 表是否的意思时，不能用if代替whether.It hasn't been decided whether he'll come or not.Whether he'll come or not hasn't been decided.3. 从句语序为主谓宾正常语序。
Why didn't he come?Why he didn't come is not known.（三）、熟记以下变化Whoever=no matter who=any one whoWhomever=no matter who=any one whoWhoseever=no matter whose=any one whoseWhichever=no matter which=any one whichWhatever=no matter what=anything thatWhat=先行词+which/that主语从句练习1.________ makes mistakes must correct them.A. WhatB. ThatC. WhoeverD. Whatever2. It worried her a bit ____ her hair was turning grey.A. whileB. thatC. ifD. for3.When and why he came here ________ yet.A. is not knownB. are not knownC. has not knownD. have not known4. ________ is no reason for dismissing her.A. Because she was a few minutes lateB. Owing to a few minutes lateC. The fact that she was a few minutes lateD. Being a few minutes late5. ________ Tom liked to eat was different from ________.A. That…that you had expectedB. What …that you had expectedC. That…what you had expectedD. What…what you had expected6.________ we go swimming every day ________ us a lot of good.A. If...doB. That...doC. If...doesD. That...does7.It ________ Bob drives badly.A. thinks thatB. is thought whatC. thought thatD. is thought that8.It's uncertain ________ the experiment is worth doing.A. ifB. thatC. whetherD. how9.________ the boy didn't take medicine made his mother angry.A. ThatB. WhatC. HowD. Which10.____ we can't get seems better than ____ we have.A. What, whatB. What, thatC. That, thatD. That, what11.____ you don't like him is none of my business.A. WhatB. WhoC. ThatD. Whether12..____ we'll go camping tomorrow depends on the weather.A. IfB. WhetherC. ThatD. Where13._________is going to do the job will be decided by the Party committee.A. ThatB. WhyC. HowD. Who14._______we'll finish translating the book depends on the time.A. WhenB. WhyC. WhatD. That15.______he won't go there is clear to all of us.A. HowB. WhatC. WhyD. This16.______the house will be built will be discussed at tomorrow's meeting.A. IfB. WhereC. ThatD. What17. ._______you come or not is up to you.A. WhatB. IfC. WhyD. Whether18. Do you know ____ he expects will give us a talk.A. whoB. whomC. thatD. whose19.._______team will win the match is a matter of public concern.A. WhichB. ThatC. IfD. How20.________leaves the room last ought to turn off the lights.A. AnyoneB. The personC. WhoeverD. Who同位语从句（一）、理解同位语从句的含义，把握同位语从句的实质1、在主从复合句中作同位语的从句称为同位语从句；所用连词与宾语从句（除不能用if）和主语从句相同2、连词1）、陈述句用that。