主语从句讲解加练习
主语从句讲解和练习
主语从句一、主语从句的连词分三类(1 )从属连词引导的主语从句(that whether if)that引导的主语从句：引导词that无含艾/在句中不做成分/不可以省。
That引导主语从句通常用it作形式主语。
例如：Tha t you wi I I win the meda I seems uni ike I y.That she survived the accident is a mi racle・whether引导的主语从句：whether有含狡(是否)/在句中不做成分/不可以省。
注意：引导主语从句，不能用if不能在开头.只能用whetheroWhether we will hold a party in the open a i r tomorrow depends on the v/eather・Whether she i s coming or not doesn' t matter too much・(2)用连接代词引导的主语从句在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever 引导的名词性从句中，其连接代词在句中超名词性作用，担当一定成分.例如：V/hat you need i s more practice.V/hatever we do is to serve the people・注：whatever / whoever 的功用whatever, whoever在主语从句中不含疑问意狡。
它引导主语从句，并在从句中作主语、宾语、表语等。
wha tever = any thing t hat; whoever = any one who。
要注意和whatever, whoever 引导的让步状语从句的区别。
如：Whoever breaks the law shouId be punished・(主语从句)( =Anyone who breaks the law shouId be punished・)Whoever breaks the law, he should be punished.(让步状语从句)( =No matter who breaks the law, he shouId be punished・)(3)用连接副词when, where, why, hov/引导的名词性从句(其连接副词有含狡，在句中作状语。
主语从句讲解及练习
2.只用 whether 不用 if 引导主语从句 . Ⅰ．选择题：
1. _____ as much as one-fifth of all timber harvested is not used.
=It is known to all that light travels in straight lines. 众所周知光沿直线传播。
When the plane is to take off has not been announced . 飞机何时起飞还没有宣布。
= It has not been announced when the plane is to take off. 还没有宣布飞机何时起飞。
It is doubtful whether she will be able to come. 她是否能来令人怀疑。
It was really astonishing that he refused to talk to you . 他拒绝和你说话真是令人惊讶。
It is essential that he should be here by the weekend . 周末之前，他应该到这里是必要的。
固定用法和译法 （ 1） It is + 名词 +从句
It is a fact that 事实是… ……
It is good news that
…是好…消…息
It is a question that
是…个问…题…
It is common knowledge that
…是常…识…
类似的名词还有： a pity； a wonder ；a good thing ； no wonder ； surprise 等。
主语从句讲解及练习
主语从句讲解及练习什么是主语从句？主语从句是由一个从句充当主语的句子结构，它由连接词引导，用来说明主语的内容或者起到引入主题的作用。
主语从句的引导词一般情况下，主语从句由以下连接词引导：- that- whether/if- who/whom- which- what- whatever- whoever- whichever主语从句的用法主语从句在句子中承担主语的角色，可以帮助我们表达某个动作、状态、事件或者事实的主题。
下面是一些常见的用法示例：1. 表达事实或真理：例如：That he is innocent is beyond doubt.（他的无辜是毫无疑问的。
）2. 表达感觉或观点：例如：What he said is very interesting.（他说的话很有趣。
）3. 引导宾语从句：例如：I believe that he will succeed.（我相信他会成功。
）主语从句的位置一般情况下，主语从句位于句首或者句中，具体位置取决于句子的结构和语境。
主语从句的练题请根据下面的句子，填写合适的主语从句：1. __________ you did yesterday surprised everyone.（你昨天做的事让大家都吃惊。
）2. __________ will happen remains unknown.（将会发生什么还不确定。
）3. __________ is important to study hard.（努力研究是很重要的。
）5. __________ we need is more time.（我们所需要的是更多的时间。
）参考答案：1. What2. What3. It4. Whether/if5. What以上是对主语从句的讲解及练习，希望对你的学习有所帮助。
高中英语高考复习主语从句翻译练习(附参考答案和知识讲解)
高考英语主语从句翻译练习班级_考号姓名总分1.据估计，上海每年春节要接待几百万游客。
(It)2.还不知道是什么原因造成这次森林火灾。
(cause)3.你要一个人完成那项任务似乎很困难。
(seem)4.无论他为他的父母做什么，都会让他们很开心。
(top)5.据报道，很多大学生想毕业后自己创业。
(report)6.我突然想到我忘记通知他们考试的时间了。
(occur》7.这个课程的创新之处在于它很大程度上尊重了小学生的学习(What)8.据说每天喝适量的葡萄酒可以使人保持年轻。
(stay)9.他从没想到两家公司都会给他工作机会，但是他不知道该如何选择，因为它们都是行业内的翘楚。
(occur)10.随着社会竞争日益加剧,青年人掌握至少两门语言是十分必要的。
(It)11.将来过怎样的生活取决于你自己。
(be up to)12.这个游戏的独特之处在于它让孩子学会如何应对现实生活中的问题。
(What)13.建议该实验在低温下操作。
(suggest)14.任何能够采用新方法解决这道技术难题的人,都将受到奖赏。
(Whoever)15.让这所学校自豪的是超过90%的学生都被重点大学录取。
(What)16.人们普遍认为在公共场合大声说话是不文明行为,应该避免。
(It)17.我从未想到那些偏远山区的孩子们生活条件如此艰苦。
(occur)18.随着科技的发展，电脑是否会取代传统的教学方式成为了当下最热的话题之一。
(substitute)19.因为蓝色是天空和海洋的颜色,所以蓝色自然常和冷静,可靠和喜爱平静生活联系在一起。
(natural)20.但凡家境殷实的单身汉，必然想娶妻成家，这是举世公认的道理。
(It)附：参考答案1.It is estimated that Shanghai receives millions of visitors every Spring Festival.2.What caused the forest fire is still unknown.3.It seems very difficult that you are to complete the task alone.4.Whatever he does for his parents makes them feel on top of the world.5.It is reported that many college students want to start their own business after graduation.6.It suddenly occurred to me that I had forgotten to inform them of the time for the exam.7.What is original in this course is that it respects pupils， study habits to a great extent.8.It is said that drinking a proper amount of wine every day can help one to stay young.9.It never occurred to him that the two companies would both give him a job offer, but he didn，t know which to choose, because both of them belong to the top of the industry.10.It is necessary for the young to master at least two languages with the social competition getting increasingly fiercer11.It's up to you what kind of life you will lead in the future12.What makes this game peculiar lies in that it teaches kids how to handle the problems in real life.13.It is suggested that the experiment should be made under a low temperature.14.Whoever can adopt a new approach to solving the technical problem will/shall be awarded.15.What made the school proud was more than 90% of the students had been admitted to key universities.16.It is generally believed/ considered/ thought that talking loudly in public is uncivilized and should be avoided17.It never occurred to me that the living conditions of the children should be so hard in the remote mountainous areas18.With the advancement of technology, whether computers will substitute for traditional teaching means has become one of the hottest topics nowadays.19.Since blue is the colour of the sky and the sea, it is only natural that it should often be associated with calmness, reliability and preference for a peaceful life.20.It is a truth universally acknowledged that a single man in possession of a good fortune must be in want of a wife.附：知识讲解主语从句就是从句作句子主语,一般放在句首，即主句谓语动词之前。
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。
主语从句超全讲解加练习
误:ＩfMaryrｅａllyｈｅaｒdhimis reallyｄoubｔｆul.
正: Wｈｅｔｈer Marｙrｅaｌlyheａrdhｉｍｉsｒｅａlly dｏubtful.
Cｏmpｌeｔetheｓｅntｅnｃｅs usｉng whａt, wheｔhｅr,ｗｈere,wheｎ, whｏ,ｗｈｙ, hｏwｏr tｈａt.
Wｈｅnｔhey wｉlllｅａvｅiｓ ｎoｔｄecided.
Howwewillpaint thehousｅhasnｏｔbeｅｎdecｉdeｄ.
注意:
1)主语从句在句首时，必须由连接词引导,不能省略这些连接词
误:Ｔｈey should lｉｋe eaｃh other isｎatｕrａl.
正：Ｔhａt thｅyshｏuld like each othｅrｉsnａtuｒal
(Who, whom，wｈicｈ，wｈat可以和ever构成合成词,和wｈat一样引导从句，ｅｖer起到强调作用。它们在句子中担任主干成分，并用陈述句形式)
What mａnｙ ｓcｉentiｓｔsｂｅlieve istｈaｔtｈe eartｈiｓrｏunｄ…
Whoｗｉｌl taｋｅpaｒｔin theｍeeting haｓｎoｔbｅen deｃidｅｄ.
Ｉt iｓobｖiｏus thａｔ…很明显…
Iｔ ｉs necｅssary＼ｉｍｐｏrtaｎｔ\natuｒaｌ\..．tｈat…+(sｈｏulｄ)do
_＿__＿_＿_＿__＿＿__＿（很可能）shｅwillcｏme bacｋtomorrow.
*＿__＿＿_＿__＿_____＿＿(很明显)ｔhiｓmeａsurｅiｓeffectiｖｅ.
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。
语法讲解：主语从句练习
主语从句练习
翻译（要求运用主语从句）
1.学校为学生提供大量的技巧性课程是很有必要的。
2.谁将会成为我们的班长还不确定。
3.我们应该向谁学习值得思考。
4.政府应该要做的是提倡人们节约水资源。
5.无论你做什么都不会影响你在我心目中的地位。
6.导致灾难的原因至今还很神秘。
7.他会那样做真是太让人吃惊了。
8.他终于实现了想去巴黎的愿望。
9.我们可以采取的第一项措施来是植树来吸收二氧化碳，从而抑制全球变暖。
10.非常奇怪，人们对于动植物濒临灭绝完全无动于衷。
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。
主语从句表语从句学案和专项练习
Subject Clause and Predicative ClauseⅠ. 主语从句(Subject Clause)一定义：__________________________________________________.1. He is right .2. What he said is right .二.主语从句引导词1.主语从句的引导词与宾语从句一样。
〔但不用if 〔是否〕，只能用whether(是否)〕1) that 2) whether3) what , which ,who, whom, whose, whatever , whichever.....4) where , when , why, how, wherever, whenever .....5) how many , what color, how far等。
2. 引导主语从句的关联词除起连接句子的作用，绝大多数关联词在主从中要充当一定的句子成分。
3. 主语从句的语序是：关联词+S+V三. 主语从句引导词的用法:1. that 的用法：that 引导句意完整, 意义明确不缺成分的述句；无词义，在主从中不充当句子成分，不能省略。
仿照例子改写句子改成相应的主语从句Model: There is life on another planet (在另外的星球上)〔that 引导的主从〕 It is almost impossible.→That there is life on another planetis almost impossible(主从) s v.1). The scientist will give us a lecture ne*t week. It is true. →2). You don’t like him. It is none of my business.(不关我的事) →3).Her hair was turning gray(灰色). It worried her bit.→4). He told her everything. It is probable.→5). He sings so well. It is no surprise.→2. whether 的用法: whether引导的主从不缺句子成分，句意不完整，表达一种不确定，不明确的概念；whether当"是否"讲，在主从中不充当句子成分。
主语从句讲解加练习(1)
4.(__W__h_o_ can join in the sport meet) is decided by the teacher. 5.(W__h_e_t_h_e_r_ it will rain or not) is not clear.
It is a pity/shame that... 遗憾的是…… It is a surprise that…令人惊奇的是… It is a fact that… …是事实 It is common knowledge that… …是常识
*__It_i_s_a__p_i_ty__th_a_t__(很遗憾)we lost the match.
Unit4 Grammar
Noun clauses as the subject
名词性从句
主语
Find the subjects in the following sentences.
1. A tree has fallen across the road. 2. You are a student. 3. To find your way can be a problem. 4. Smoking is harmful to you. 5. What she said is not yet known. 6. That we shall be late is certain. 7. It’s certain that we shall be late.
主语从句 讲解与练习
C.It+be+过去分词 (said, reported, thought, expected, announced, arranged, etc.) +that从句 It is said that Mr. Green has arrived in Beijing.
D.It+(seems, happens, appears等不及物动词及短 语)+that从句 It happened that I was out that day. It seems that she is not in a good mood.
E.It+(doesn’t matter, makes no difference,etc)+ 连接代词或连接副词引导的 主语从句 It doesn’t matter whether she will come or not.
ቤተ መጻሕፍቲ ባይዱ
主语从句与强调句的区别
1). 在主语从句中，把It be … that 去掉之后，句子成分不完整；在 强调句中，则是个完整的句子； 2). 主语从句多种引导词；强调句 的引导词只有：that, who。
What you said is of great importance. How he was successful is still a puzzle.
3.主语从句置于句首时，必 须由连接词引导，不能省略 这些连接词；但是如果用it 作形式主语，主语从句后置 时，则从属连词that可以省 略。 That he is a hero is known by everyone.
Subject Clauses 主语从句
A tree has fallen across the road.
主语从句讲解和练习题
高考英语主语从句定义：用作主语的从句叫主语从句，它是名词性从句之一。
主语从句的时态：不受主句的时态影响和限制。
引导主语从句的连接词有：从属连词: that, whether；连接代词: who (whoever), whom, whose, what (whatever)和which (whichever)；连接副词: when, where, how和why。
连接词：1. 从属连词：that，whether1）that引导主语从句只起引导作用，在主语从句中不充当任何成分，that本身无实际意义，但不能省略。
2）whether意为“是否”，放在句首句末皆可。
由whether引导的名词从句做主语，表语，介词宾语，同位语时！不可用if代替。
a.That price will go up is certain.b. Whether they would support us was a problem. 他们是否会支持我们还是一个问题。
2. 连接代词who ，what ，which, whatever, whichever, whoever (Who, whom, which, what 可以和ever构成合成词，和what一样引导从句，ever起到强调作用。
此类主语从句不能用形式主语it引导，它们在句子中担任成分，不能省略，语序为陈述语序，既有疑问含义,又起连接作用,同时在从句中充当各种成分。
Which side will win is not clear. Whoever breaks the law will be punished.Whatever he did is right. Who killed the scientist remains a question.1）What和that引导的主语从句的区别：that 只起引导作用，不充当任何成分，没有意思。
What 不仅起引导作用，还要充当一定成分(主语、宾语或表语)，意思是：“什么”。
主语从句翻译讲解及练习
tomorrow depends on the weather. 她干了什么尚不清楚。 What she has done is not clear. 她去了哪儿，还不知道。 Where she has gone is not known.
句子翻译练习
你需要的是更多的练习。 What you need is more practice. 他是否加入我们，没有太大的差别。 It doesn’t make any difference whether they join us
or not. 很明显他已经尽力而为了。 That he has done his best is obvious. 他们什么时候来还不知道。 When they will come is still not known.
It is believed that…
人们相信……
It is known to all that…
从所周知……
It has been decided that… 已决定……
形式主语句
c.
It + be +名词+ that-从句
It is common knowledge that… ……是常识
句型二：Whether + 完整句=名词
Whether you can succeed in making your dream come true depends on hard work more than luck.
Whether computer can replace the role of teachers has long been a hot topic.
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。
主语从句
主语从句作句子主语的从句叫主语从句。
主语从句通常由下列词引导：1从属连词that，whether 等；2连接代词what，who，whic h，whatever，w hoever，w hom 等；3 连接副词how，when，where，why 等。
一、从属连词：that，whether等.1、that 引导主语从句只起引导作用，本身无实际意义，在主语从句中不充当任何成分，但不能省略。
That he w ill w in is c ertain.他肯定会赢。
Whether he’ll c ome here isn’t c lear. 他是否会来这里还不清楚。
2、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：1. That he w ill refuse this piec e of advic e is impossible.____________________________________3、这样就构成了下面一些常用句型:（1）: It is + n. +从句It is a pity/shame that... 遗憾的是……It is a surprise that…令人惊奇的是…（2）: It is + adj. +从句It’s certain that…肯定…It is possible that... 很可能……*（3）: It +不及物动词+从句It happened that... 碰巧……It occurred to me that…我突然想起…*________________(刚好)I came into the office at that time.（4）: It + be +过去分词+从句It is said that... 据说……It is believed that...据信……;人们相信……It is suggested that + (should）do... 建议……It must be admitted that…必须承认……*___________________(据报道)20 people were killed in the accident.*______________________(建议)we should eat more v egetable and do more exercise.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 nec essary (important, natural, strange, etc.) that … It is suggested (requested, proposed, desired, etc.) that…众所周知（1）It is known to us that二、连接代词who ，what ，which, whatev er, whichev er, whoev er ,whom(Who, whom, which, what可以和ever构成合成词，和what一样引导从句，ev er起到强调作用。
主语从句讲解和练习题
主语从句讲解和练习题公司内部编号：（GOOD-TMMT-MMUT-UUPTY-UUYY-DTTI-高考英语主语从句定义：用作主语的从句叫主语从句，它是名词性从句之一。
主语从句的时态：不受主句的时态影响和限制。
引导主语从句的连接词有：从属连词: that, whether；连接代词: who (whoever), whom, whose, what (whatever)和which (whichever)；连接副词: when, where, how和why。
连接词：1. 从属连词：that， whether1）that引导主语从句只起引导作用，在主语从句中不充当任何成分，that本身无实际意义，但不能省略。
2）whether意为“是否”，放在句首句末皆可。
由whether引导的名词从句做主语，表语，介词宾语，同位语时！不可用if代替。
price will go up is certain.b. Whether they would support us was a problem. 他们是否会支持我们还是一个问题。
2. 连接代词who ，what ，which, whatever, whichever, whoever (Who, whom, which, what可以和ever构成合成词，和what一样引导从句，ever起到强调作用。
此类主语从句不能用形式主语it引导，它们在句子中担任成分，不能省略，语序为陈述语序，既有疑问含义,又起连接作用,同时在从句中充当各种成分。
Which side will win is not clear. Whoever breaks the law will be punished.Whatever he did is right. Who killed the scientist remains a question. 1）What和that引导的主语从句的区别：that 只起引导作用，不充当任何成分，没有意思。
高中从句练习题及讲解
高中从句练习题及讲解
1. 题目：请用定语从句描述你最喜欢的季节。
答案：我最喜欢的季节是春天，春天是万物复苏，鲜花盛开的季节。
2. 题目：使用宾语从句写一个关于你梦想的句子。
答案：我梦想有一天能够环游世界，见识不同的文化和风景。
3. 题目：用状语从句描述你早晨起床后的活动。
答案：早晨起床后，我总是先喝一杯温水，然后开始我的晨练。
4. 题目：使用主语从句写一个关于学习的重要性的句子。
答案：学习新知识是提高个人能力的重要途径，这对我来说是不言
而喻的。
5. 题目：用同位语从句描述你的朋友。
答案：我的朋友，一个热情开朗的人，总是能在困难时刻给我鼓励。
6. 题目：使用条件状语从句表达对未来的期望。
答案：如果我能够努力学习，我相信我将来会成为一名优秀的科学家。
7. 题目：用虚拟语气的从句写一个关于过去的假设。
答案：如果我去年没有参加那个夏令营，我就不会认识那么多有趣
的人。
8. 题目：使用让步状语从句描述一个不变的事实。
答案：尽管天气很冷，但我还是坚持每天早晨跑步。
9. 题目：用强调句型写一个关于友谊的句子。
答案：正是那些困难时刻，让我意识到了朋友的重要性。
10. 题目：使用原因状语从句解释为什么你选择学习这门课程。
答案：我选择学习这门课程是因为我对这门学科充满了浓厚的兴趣。
这些练习题覆盖了从句的多种类型，包括定语从句、宾语从句、状语从句、主语从句、同位语从句、条件状语从句、虚拟语气、让步状语从句、强调句型和原因状语从句。
通过这些练习，可以帮助学生更好地理解和运用英语中的从句结构。
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 （连合动词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句型或者do句型。
可以用下列公式举行表示：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宾语从句的形式：1、主谓宾句型的宾语从句: 作为名词的宾语扩展成一个be句型或者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要it来做形式宾语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主谓形式宾语补宾语从句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,感觉特殊遗憾.I have made it a rule that I keep diaries.我每天写日记成了习惯.4、宾语从句的省略形式：某些形容词后面可以带宾语从句，其形式为sb+be+形容词+that宾语从句：这一类形容词通常是表示人物的心理，情绪等状态的形容词如：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：上面句子中介词后面所跟成分都做介词宾语。
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3)连接副词when，where， how， why等。
Why they suddenly disappeared still remains a mystery. When they will leave is not decided. Where she is from is unknown. How we will paint the house has not been decided.
主语从句的规律：
例3. If the meeting will be put off has not been decided yet.
正： Whether the meeting will be put off has not been decided yet.
规律三、whether 可以引导主语从句， 放在句首，但if不能
natural. 正：It is natural (that) they should like
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.
*__It_i_s_a__f_a_c_t _th_a_t_(这是事实)he cheated in the exam.
2) It is + adj. +从句 It’s certain that… 肯定… It is possible that... 很可能…… It is unlikely that... 不可能…… It is obvious that… 很明显… It is necessary \important \natural\... that… +(should) +do…
规律五、含主语从句的主句谓语动词多用 单数第三人称形式。
主语从句的规律：
1. What he needs is that book.
2. What he needs are some books.
规律六、what 引导的主语从句，可根据 表语决定主句动词的单复数形式。
规律七、主语从句为了避免头重脚轻现 象，用 it 做形式主语，而 把从 句放在后面。
decided. we shall 2.You have made a mistake is a fact.
That you have 3. If the policeman will come is not certain.
Whether
4. That is certain that we can win. It
注意:
1）主语从句在句首时，必须由连接词引 导，不能省略这些连接词；但是如果用it 做形式主语，而把主语从句放在句末时， 从属连词that可以省略。
误：They should like each other is natural. 正：That they should like each other is
1）从属连词：that， whether等. that 引导主语从句只起引导作用，本身无实 际意义，whether 有含义，但 与that一样在 主语从句中不充当任何成分，不能省略。
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。
什么叫名词性从句？
• 在句子中起名词作用的句子叫名词从句 (Noun Clauses）
• 名词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
名词性从句 noun clause
It must be admitted that…必须承认……
It cannot be denied that… 不可否认……
It must be pointed out that…需指出的是……
*_I_t_i_s__re_p__o_r_te__d_t_h_a_t__(据报道)20 people were
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
Grammar
Grammar
主语从句：
做主语用的名词性从句，因其在复合句中做主语， 又称主语从句，引导主语从句的有连词that ， whether， 连接代词who ，what ，which， 连 接副词when，where， how， why等。
That the earth turns around the sn 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
以和ever构成合成词，和what一样引导从句，ever起到 强调作用。此类主语从句不能用形式主语it引导，它们在 句子中担任成分，不能省略，语序为陈述语序)
What many scientists believe is that the earth is round …
Who will take part in the meeting has not been decided.
Conclusion: 主语从句作主语时，谓语动词一般用单数形式。
主语从句的规律：
找出下列句子中的错误，并总结规律
例1.When will he come is not known. 正：When he will come is not known.
规律一、主语从句一律用陈述语序， 即主语在前，谓语在后。
Whoever breaks the law will be punished.
Which student will win is uncertain. Whatever was said here must be kept secret.
这里说的话都应当保密。 Whoever makes mistakes must correct them.
4) It + be +过去分词+从句
It is said that...
据说……
It is known to all that... 众所周知……
It is reported that... 据报道……
It is believed that...据信……;人们相信……
It is suggested that + (should）do... 建议……
It is a pity/shame that... 遗憾的是…… It is a surprise that…令人惊奇的是… It is a fact that… …是事实 It is common knowledge that… …是常识
*__It_i_s_a__p_i_ty__th_a_t__(很遗憾)we lost the match.
正: Whether Mary really heard him is really
doubtful.
Complete the sentences using what, whether, where,
when， who, why, how or that.
1.(__W__h_atis needed for success) is your hard work. 2W.(h_e_n_/_H_o_wthey will arrive )has been told to the teacher. 3.(W__h_e_r_e/wwheewthilelrgo tomorrow )hasn’t been decided yet. 4.(__W__h_o_ can join in the sport meet) is decided by the teach 5.(_W__h_e_th__er_ it will rain or not) is not clear.
5. It is ordered we should leave at
once.
that
6. Where he comes from are a
碰巧……
It occurred to me that…我突然想起…
*_I_t_h_a_p_p_e_n_e_d__t_h_a_t_(刚好)I came into the office at that time.
*_I_t _o_c_c_u_r_re_d__t_o_m__e_t_h_a_t_(我突然想起)I forget to sent the letter.
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:
1. That he will refuse this piece of advice is impossible. __I_t _is__im__p_o_s_s_i_b_le__th_a_t_h__e_w_i_ll_r_e_f_u_s_e_t_h_i_s_p_i_e_c_e __o_f_a_d_v_i_c_e_._____________________________
主语从句的规律：
例4. That whether he will help others is a fact.
正：That he will help others is a fact.