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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。
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。
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。
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。
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。
