高中英语名词性从句系列讲解和练习(主语从句)
(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。
主语从句讲解及习题
名词性从句之主语从句一、名词性从句概述：在句子中起名词作用的各种从句统称为名词性从句。
根据它们在句中的语法作用，这类从句又可分为主语从句、同位语从句、表语从句和宾语从句。
二、主语从句定义：在句中起主语作用的从句称为主语从句。
引导主语从句的连接词主要有：单纯连词(that, whether/ if)、连接代词(what, whatever, who, whoever, whom, whose, which, whichever 等)和连接副词(when, where, why, how, whenever, wherever, however 等)。
1)that引导的主语从句(1)由连词that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。
例如：That you will win the medal seems unlikely.你能得奖看起来不大可能。
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.你不喜欢他不管我的事。
(2)形式主语it替代主语从句位于句首，that引导真正的主语从句会放到句子的后面。
常用的句式主要有如下几种：1.It+系动词+形容词+that从句。
如：It is necessary that … 有必要 .....It is clear that … 很清楚.....It is likely that … 很可能.....It is important that … 重要的是.....类似的形容词还有：strange; natural; obvious; true; good; wonderful; possible; unlikely; quite; unusual; certain; evident; worth-while; surprising; interesting; astonishing, etc.例如：It was really astonishing that he refused to talk to you.It is essential that he should be here by the weekend.It seems obvious that we can not go on like this.It is necessary that you (should)master the computer.It is important that a student learn English well.It' s clear that they badly need help.It is likely that a hurricane will arrive soon.知识拓展：在“It is necessary / important/surprising/strange/unthinkable/unbelievable/incredible+that 从句”这类主语从句结构中，从句中谓语动词常用(should) +动词原形”，形式，即要用虚拟语气should 可省略。
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。
高考英语名词性从句讲解及练习
名词性从句：主语从句，宾语从句，表语从句，同位语从句。
一．主语从句：由一个从句来充当句子的主语的复合句。
1. _______the earth is round is true.A. WhatB. ThatC. WhereD. How2. __________( If, Whether ) he will come hasn’t been decided.3. ________ you need is more pracitce.A. WhatB. ThatC. All whichD. How4. _________ hasn’t been decide d.A. When will we have the meetingB. When we will have the meeting5. _________ leaves the classroom last will turn off the lights.A. WhateverB. WhoeverC. WhoD. Whom6. _________ was said here must be kept secret.A. WhateverB. WhoeverC. WhoD. What1). 引导主语从句的连接词有：连词that, whether；连接代词who, whoever, what, whatever 和which；连接副词when, where, how和why。
注意：1. 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。
2. 表示“是否”时,只能用“whether”引导主语从句3. 疑问词( when, where, why, what…)+陈述语序2).为了防止一些句子头重脚轻，通常用it做形式主语1. It is said ________ his father will come back from Japan.A. WhatB. ThatC. All whichD. How2. It is surprising _______ the weather is so warm for April.A.thatB.whenC.whetherD.where3. That the earth is round is true.=4. Whether he will come hasn’t been decided.=5. Where the hero went is not mentioned at the end of the story.=用it 做形式主语的常用句型It is a fact (a shame, a pity, good news…)It is true (certain, clear…)It is said (reported, believed…)It seems/happened that …It worried sb a lot that …注意：It is important / natural / necessary / impossible/strange/unusual /suggested /advised /ordered/ requested/insisted/ required …that 中，从句谓语动词用“(should) + do”的形式, It is necessary that we ________________(learn) English grammar well.It is suggested that we ________________(not go) out to play.3). Who, whom, which, what可以和ever 构成合成词，引导从句，起加强语气的作用。
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。
高中英语2024届高考名词性从句知识分类讲解(主语从句+宾语从句+表语从句+同位语从句)
高考英语名词性从句知识讲解名词性从句是指在复合句中起名词作用的句子，功能相当于名词词组。
名词性从句在复合句中能作主语、宾语、表语、同位语等，根据在句中的语法功能可分为主语从句、宾语从句、表语从句和同位语从句。
一、主语从句【定义】在复合句中，作主语的句子称为主语从句。
常见的连接词：（连接词在句中不能省略）that, whether, who, what, whatever, whoever, where, when, why, how等。
【用法】1.连接词 that 引导That we should learn English well is very important.主语从句中 we should learn English well句子完整，不缺成分，用that引导，that 不能省连接词whether，if 引导whether 引导的主语从句可放句首，也可放句中，表“是否”if 引导的主语从句只能引导动词后的宾语Whether I will go or not depend on the weather.It remains to be seen whether / if they can finish the task in time.2.连接代词what, who, which, whose, whatever, whichever，whoever等引导What matters most is your attitude.3.连接副词when，where，why，how等引导How he made it is still unknown.4.it作形式主语为了避免句子头重脚轻，通常把形式主语it放在句首，真正的主语放在句子后面。
常见句型：(1) It is + n.+ that + 句子It is +（a pity / a shame / a fact …）+ that ...(2) It is + adj.+ that + 句子It is +（true / clear / important …）+ that ...(3) It is + 过去分词 + that + 句子It is+ said / announced / expected / believed / hoped… + that ...(4) It seems /appears / happens / turned out that + 句子(5) It hit sb./occurred to sb.that + 句子二、宾语从句【定义】在复合句中，作宾语的句子称为宾语从句。
名词性从句(宾语从句表语从句主语从句)讲解与练习
名词性从句（宾语从句表语从句主语从句）讲解与练习六大基本句型1主系表句型----- be 〔连系动词do〕2、主谓宾----- do〔vt〕3、主谓----- do(vi)----(不及物动词)4、主谓宾补----do(vt)5、主谓宾宾---do(vt) 记双宾语的动词一定要记。
6、There be (不及物动词do)--------be (不及物动词)宾语从句定义：在主谓宾句型的宾语的位置上把做为名词的宾语扩展成一个be句型或许do句型。
可以用以下公式停止表示：主语+谓语+从句。
宾语从句的连词① that , ②whether(or not)或if; ③which(whichever),who(whoever)，whom(whomever) ，whose(whosever)，what(whatever); ④when(whenever)，where(wherever)，why，how(however); ⑤ how many, how much, how long, how often，how soon宾语从句的方式：1、主谓宾句型的宾语从句: 作为名词的宾语扩展成一个be句型或许do句型。
He knows the newsHe knows that the teacher is in classroom2、主谓宾宾---do(vt) 句型的宾语从句，把直接宾语变为一个be或do句型。
He tells me the newsHe tells the news to meHe tells me that she is a teacherHe tells that she is a teacher to me3、主谓宾补句型的宾语从句需求it来做方式宾语I find Chinese important主谓宾补I find that we make a quick decision about this matter important主谓宾语从句补I find it important that we make a quick decision about this matter主谓方式宾语补宾语从句I think it necessary that we take plenty of hot water every day .我以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,觉得十分遗憾.I have made it a rule that I keep diaries.我每天写日记成了习气.4、宾语从句的省略方式：某些描画词前面可以带宾语从句，其方式为sb+be+描画词+that宾语从句：这一类描画词通常是表示人物的心思，情感等形状的描画词如：sure, certain, glad, please, happy, sorry, afraid, satisfied, surpriseda. I am glad (that) you helped me.b、I am sure (that) you can pass the exam.1、I am glad of your help.2、I am sure about your exam.剖析：下面句子中介词前面所跟成分都做介词宾语。
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。
名词性从句学案(语法精讲-主语从句、宾语从句、表语从句、同位语从句)+经典习题(含答案)
名词性从句名词性从句〔主语、表语、宾语、同位语从句〕（一）主语从句1．定义：用作主语的从句叫做主语从句。
2．构成：关联词+简单句3．引导主语从句的关联词有三类：(1) 附属连词that。
如：That they were in truth sisters was clear from the facial resemblance between them.很明显，她们确是亲姐妹，她们的脸型很相似。
(2) 附属连词whether。
如：Whether he’ll come here isn’t clear. 他是否会来这里还不清楚。
(3) 连接代词who, whom, whose, what, which, whoever, whatever, whichever连接副词where, when, how, why。
如：What she did is not yet known. 她干了什么尚不清楚。
解释：1．主语从句能用it作形式上的主语。
常以it作形式主语的句型有：A. It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。
如：It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。
B. It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句。
如：It’s a pity that we can’t go. 很遗憾我们不能去。
C.It+seem, happen等不及物动词及短语+that从句。
如：It seems that Alice is not coming to the party at all. Alice似乎不来参加晚会。
高中英语名词性从句讲义及练习
高中英语名词性从句讲义及练习1.名词性从句的分类主语从句、宾语从句、表语从句、同位语从句Eg. 1) I know that he came to Beijing yesterday.2)What he said is rather interesting.3)This is what he’s emphasizing about.4)Linda, who is your teacher, will visit you in the next weekend.2.如何判断是哪一种从句主语从句：What she said is interesting.What he confessed will make you suffered.（）V ……宾语从句：1)I hate that you always talk like that. Vt + 句子2)I’m interested in what he said just now. 介词+ 句子3)I’m sure that he will come tomorrow. 形容词+ 句子表语从句：This is what I said yesterday.That’s why I don’t wanna be with you any more.同位语从句：He revealed the fact that he doesn’t like you anymore .3.名词性从句如何选择连词I know _______ he likes.1）阅读题和改错题里找谓语，语篇填空里看_______（空白格）前面还是后面为句子。
2）找到谓语后确定从句范围。
3）看连词在从句中是什么位置。
作主语、宾语、定语或是状语。
I know _______ is good.从句中做主语：人who 物：whatI know _______ he likes.从句中做表语、宾语：人who/whom 物：whatI know _______ book is good.从句中做定语：whichI know _________ he lives.从句中做状语：where when why how占位词：that whether if当堂练习：1._______________ he said at the meeting astonished everybody present.2._______________ worries me a lot is that I’m always forgetting ___________ I have just done.3.A modern city has been set up in __________ was a wasteland ten years ago.4.With his work completed, the business stepped back to his seat, feeling pleased _________ he was a man of action.5.______________ makes me this shop different is that it offers more personal.6.See the flag on top of the building? That was __________ we did this morning.7.After _____________ seemed an endless effort, the patient was finally able to take a normal walk.8.They have not made any decision on _____________ they are going do to deal with the waste and control pollution.9.The other day, my brother drove his car down the street at __________ I thought was a dangerous speed.10.It was a matter of _______________ would take the position.[注意]1）what 和how 的区别I don’t know what I should do.I don’t know how I should do.练习：It is none of your business ___________ other people look at you.It is none of your business ___________ other people say.2）which 和what的区别I know ________ book is funny.I know _______ is funny.练习：It is generally considered unwise to give a child ____________ he or she wants._______________ team wins on Saturday will go through to the national championships.3) whether 和if 的区别_____________________ the 2024 Olympic Games will be held in Beijing is not known yet.If 只引导宾语从句whether和if的区别。
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。
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。
主语从句超全讲解加练习
each other.
2)如果主语从句放在句首，不能用if引 导，但是如果用it 做形式主语，而把主 语从句放在句末时，也可以用if引导.
或把if 改为whether
误：If Mary really heard him is really doubtful. 正：It was doubtful if Mary really heard him.
killed in the accident.
*__It__is__s_u_g_g__e_s_t_e_d__th_a__t __(建议)we should eat
more vegetable and do more exercise.
2.连接代词who ，what ，which, whatever, whichever, whoever (Who, whom, which, what可
That he will win is certain.他肯定会赢。 Whether he’ll come here isn’t clear. 他 是否会来这里还不清楚。
注意: 由that 引导的主语从句有时为了使句
子结构平衡, 避免 “头重脚轻”, 常用 it 作形式
主语, 而把从句放在后面。 例如:
That the earth turns around the sun is known to all.
It is known to all that the earth turns around the sun.
找出错误，并给出理由： 1.Where shall we spend the holiday isn’t
高考语法 名词性从句之主语从句与表语从句 讲解及练习(附答案)
名词性从句1 主语从句：在复合句中充当主语成分的句⼦子叫主语从句 1.1 主语从句的引导词 1.2 主语从句的形式Conlusion 1:主语从句作主语时，谓语动词一般用单数（第三人称）形式。
Conlusion 2:连词That在句中无实际意义，不能省略。
Conlusion 3:whether引导的主语从句可放在句首，但if不能。
Conlusion 4:主语从句中连词that/whether等不能重复使用。
Conlusion 5:what引导的主语从句，可根据表语决定主句的单复数形式。
Conlusion 6:为了平衡句子结构，主语从句大多可改写为it形式主语形式。
从属连词连接副词连接代词引导词that,whether,if when, why, where, how, whenever, wherever, however what, who, whom, which, whatever,whoever, whomever, whichever形式说明⽰示例that 引导的主语从句置于句⾸首、that 在主语从句中不做任何成分、不可省略他要来看望我们，这使我们很⾼高兴。
形式评语it代替主语从句It + is/was + adj. +从句对于学⽣生来说很明显的是，他们要为未来做好准备。
“It is/was + necessary/important/surprising/strange/unbelievable/obvious…+从句”结构中，从句谓语动词用“should+动词原形”，should可以省略It + is/was + 名词 +从句我们的希望是，我们都能通过考试。
It + is/was + V-ed +从句据宣布，该计划已经顺利通过。
“It is/was + suggested/advised/ordered/insisted/required/demanded…+从句”结构中，从句谓语动词用“should+动词原形”，should可以省略It + is/was + 特殊动词 +从句(happen,occur,seem,appear…)你似乎不同意这个计划。
高考名词性从句讲解、习题及答案
名词性从句名词性从句（主语从句，表语从句，宾语从句，同位语从句）1.that 引导的名词性从句，that 在从句中不充当任何句子成分，没有词义。
that引导宾语从句时常可省略，但如果引导两个以上宾语从句时，that不省。
引导主语从句时常可用it 作形式主语That light travels in straight lines is known to all.众所周知光是以直线运行的。
（主语从句）=It is known to all that light travels in straight linesThe reason for his absent was that he was ill.他缺席的原因是他病了。
（表语从句）I think( that) you are right.我认为你是对的。
（宾语从句）The news that our football team has won is true.我们足球队赢了的消息是真的。
（同位语从句）注意区别：The news( that/which) he told me is true.他告诉我的消息是真的。
（定语从句）2.what 引导的名词性从句，what 在从句中必须要作主语，宾语，表语,常译作“所---的”或“什么”,what 一般不引导同位语从句What we need is water.我们所需要的是水。
（主语从句）What we need are useful books.我们所需要的是有用的书。
（主语从句）This is what I want to say.这就是我想说的。
（表语从句）Please tell me what she is saying.请告诉我她在说什么。
（宾语从句）3.how,where,when,why,等引导的名词性从句，保留疑问词的原意，或译为-“--的地方”“---的时候”Do you know how he came here?By bus.你知道他是怎么来的吗？乘公共汽车。
主语从句详解及练习_附答案
高二年级语法要点剖析（李翌洋）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：（1）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。
注意：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。
高考英语语法一轮复习——名词性从句精讲及练习(附答案)
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。
一．主语从句主语从句是在主句中作主语的句子，它由连接词引导，通常位于谓语动词之前。
1. 连词：在从句中不充当任何成分，常用见的引导主语从句的连词有三个，即that, whether和if.That he got the first prize excited him much. 他获得一等奖一事使他非常兴奋。
Whether you can succeed or not depends on how hard you work at it. 你能否功取决于你努力的程度。
注意：whether引导的主语从句常用置于句首，表示“是否”之意；if引导主语从句时不置于句首。
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。
常见的连接代词有who, whom, whose, what, which, whoever, whomever, whatever, whichever.What we should do with the problem is undecided. 我们如何处理这上问题还未作出决定。
3. 连接副词：在从句中起副的作用，常作从句的状语，表示时间、地点、原因、方式等。
常见的连接副词有when, where, how, why, whenever, wherever, however等。
How they will solve the serious problem has not been decided. 他们将如何解决这个严重的问题还没有决定。
Why he did that wasn’t quite clear. 他为什么做那件事还不十分清楚。
(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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练习（主语从句）
一、.关联词分类和基本句型：
(1)从属连词that。
如：That they were indeed sisters was clear from the facial resemblance between them.
很明显，她们确是亲姐妹，她们的脸型很相似。
______ we need more equipment _____ quite obvious. 我们需要更多的设备，这是很明显的。
(2)从属连词whether。
如：
Whether he’ll come here isn’t clear.他是否会来这里还不清楚。
______ he will join us won't _____ too much difference.他是否和我们一起干无所谓。
(3)连接代词who, whom, whose, what, which, whoever, whatever, whichever
连接副词where, when, how, why。
如：
What you need is more practice. 你需要的是更多的练习。
Whoever wants it may have it. 谁要都可以给他。
_____she did ____ not yet known. 她干了什么尚不清楚。
_____ this happened is not _____ to anyone. 这事怎样发生的，谁也不清楚。
______ comes _____ welcome. 不论谁来都欢迎。
二、主语从句后置：
主语从句能用it作形式上的主语。
常以it作形式主语的句型有：
A.It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。
如：
It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。
_____ _____ probable ______ he told her everything. 很可能他把一切都告诉她了。
B.It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句。
如：It’s _____ ______ that we can’t go.很遗憾我们不能去。
It’s ______ _______ that our team should have won the game. 我们没赢这场比赛真意外。
C.It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句。
如：
It is ______ ______Mr. Green has arrived in Beijing. 据说格林先生已经到了北京。
It is ______ _______ China has sent another man-made earth satellite into orbit.
据报道中国又成功地发射了一颗人造地球卫星。
D.It+seem, happen等不及物动词及短语+that从句。
如：
It seems that Alice is not coming to the party at all. Alice似乎不来参加晚会。
_____ _______ ______ I was out that day. 碰巧我那天外出了。
E.It+doesn’t matter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。
如：
It doesn’t ______ _______ she will come or not. 她是否来这无关紧要。
It _____ _____ difference ______ we shall have the meeting. 我们在哪里开会毫无区别。
三、注意连接代词whoever, whatever, whichever等引导主语从句的含义：
_______ comes will be welcome. (whoever=the person who) 来的都是客。
_________ he did was right. (whatever=the thing that) 他所做的事情都是正确的。
________ _____ ______ comes in will receive a prize. (whichever=anyone of you who) 你们当
中不论哪个进来将会得到奖励。
四、主语从句与虚拟语气：
形容词为necessary, important, impossible, strange, natural, essential时，在“It + be + 形容词或过去分词+ 主语从句”中，主语从句要虚拟。
It is necessary that the problem ( ______ ) _____ ________ at once.
立刻讨论这个问题很有必要。
It is strange that he ( _____ ) have so many friends. 太奇怪了，他有那么多的朋友。
五、在高考题中考查的主语从句：（以下来自全国各地高考试卷）
1. It has been proved _________ eating vegetables in childhood helps to protect you against serious illnesses in later life.
A. if
B. because
C. when
D. that
2. ________ matters most in learning English is enough practice.
A. What
B. Why
C. Where
D. Which
3. ______ parents say and do has a life-long effect on their children.
A. That
B. Which
C. What
D. As
4. ________ puzzles the scientists how these creatures can survive in such severe conditions.
A. What
B. As
C. That
D. It
5. _____ leaves the room last ought to turn off the lights.
A. Anyone
B. Who
C. Whoever
D. The person
6. ______ you will be admitted to York University will be decided by the Admission Committee.
A. That
B. Whether
C. What
D. If
7．_______your father wants to know is________ getting on with your studies.
A. What; how are you
B. That；how you are
C. How；that you are
D. What；how you are
8.________he really means is ________he disagrees with us.
A. What …that
B. That …what
C. What …what
D. That …what
9.We sell handmade gifts. _____gift you order from us is unique for the special person!
A. Which
B. That
C. Whichever
D. What。