主语从句讲解及练习
主语从句强调句讲解练习
主语从句1．定义：用作主语的从句叫做主语从句。
2．引导主语从句的关联词有三类：(1)从属连词that、whether。
如：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。
Whether he’ll come here isn’t clear. 他是否会来这里还不清楚。
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，在主语从句中不充当任何成分，但不能省略。
由whether及其他连词引导的主语从句放在句首，句后都可。
If只能放在句中。
(2) （特殊疑问词）连接代词who, whom, whose, what, which, whoever, whatever, whichever如：___which_______watch was lost is unknown._____what_____she did is not yet known. 她干了什么尚不清楚。
__which________side will win is not clear.Whoever comes is welcome. 不论谁来都欢迎。
(3) （特殊疑问词）连接副词where, when, how, why，wherever，whenever，however。
___________ he did it remains a mystery.When they will start is not known yet.How this happened is not clear to anyone. 这事怎样发生的，谁也不清楚Wherever you are is my home ---- my only home.你所在的任何地方就是我的家----我唯一的家。
初中英语主语从句
初中英语主语从句主语从句是英语语法中的一个重要概念，在句子中起到主语的作用。
掌握主语从句的用法对于提高英语的句子结构和语法的准确性至关重要。
本文将详细介绍初中英语主语从句的定义、用法、结构以及常见的引导词。
同时，提供一些例句和练习，帮助读者更好地理解和应用主语从句。
一、定义主语从句，顾名思义，即可在句子中作主语的从句。
它通常由连词引导，放在句首，并且在句子中起到主语的作用。
主语从句可以是一个完整的句子，也可以是一个简单的短语。
二、用法1. 主语从句可以替代一个复杂的名词短语作为句子的主语，使句子更加简洁明了。
例如：- Whether she will come to the party is still unknown.（她是否会来参加聚会还不确定。
）- What you said is very important.（你说的话非常重要。
）2. 主语从句常出现在以"It is"开头的句子中，这种句子结构被称为"It is"句型。
主语从句位于"It is"之后，形成强调句型。
例如： - It is important to learn a foreign language.（学习一门外语很重要。
）- It is necessary that we should protect the environment.（我们有必要保护环境。
）3. 主语从句可以通过引导词来引导，根据不同的情况选择合适的引导词。
下面是一些常见的引导词及其用法：- Whether（是否）：用于对一个选择或问题进行提问。
例如：I don't know whether he will come or not.（我不知道他会不会来。
） - That（是否）：用于对一个陈述性语句提问。
例如：That he is a doctor is well-known.（他是医生是众所周知的。
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。
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。
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.
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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。
It is estimated that the vase is 2000 years old. 据估计这个花瓶有 2000 年的历史。
It is used to be thought that a new star must be due to a collision between two stars. 过去一直认为新星是由于两颗星 星之间碰撞产生的。
A. which B. what C. how
D. it
6. _____ she had forgotten to take her notebook.
A. That occurred to her
B. She occurred that
C. To her that occurred
D. It occurred to her that
A. That
B. When
C. What D. Which
14. _____ is a spell of warm sunshine.
A. What do we all need.
B. What all we need
C. What we need
possible; unlikely;
quite; unusual; certain
evident; worth-while; surprising; interesting; astonishing, etc. 例如： It is obvious that conductors and insulators are both important in industry. 很明显导体和绝缘体在工业中都很重要。
例如： It is a mystery to me how it all happened.
这一切是怎么发生的是个谜。
It is common knowledge that the whale is not a fish. 鲸鱼不是鱼，这是常识。
It is no surprise that Bob should have won the game. 鲍勃会赢得这场比赛，这不足为奇。 （ 2） It is + 形容词 +从句
例如： That you will win the medal seems unlikely. 你想获得奖牌看起来是不可能的。
That you are so indifferent bothers me. 你如此冷淡使我很烦恼。
That she survived the accident is a miracle. 她在事故中幸免于难简直是奇迹。 （ 2） 用连词 whether 引导的主语从句 :whether 有含义 (是否 ),在句中不做成分 ,不可以省。
It has not been made clear when the new road is to be opened to traffic. 还没弄清楚这条路将开始通车。
It does not matter if I missed my train, because there is another later.
7. I am sure that _____ she said is wrong.
A. which B. all C. this
D. what
8. We lost our way in the forest, and _____ made matters worse was that it was getting dark.
C. The reason of being
D. That he is
5. Although _____ happened in this developed country sounds like science fiction, it could occur elsewhere in the world
没有赶上这趟火车没有关系，稍晚还有一趟。
It happened that I saw him yesterday. 碰巧我昨天看见他了。
当 “及物动词 + 宾语 ”较短时，也可用这种结构。 例如： It shocked me that Peter did not tell anybody where he was. 让我吃惊的是彼得没有告诉任何人他在哪里。
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;
A. that
B. which C. it
D. what
9. _____ some mammals came to live in the sea is not known.
A. Which B. Since C. Although D. How
10. _____ or not is still uncertain.
主语从句讲解及练习
主语从句 一、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 .主语从句主要有三类： （ 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。
A. The estimate
B. The estimate
C. They are estimated
D. It is estimated that
2. _____ some mammals came to live in the sea is not known.
A. Which B. Since C. Although D. How 3. _____ we have achieved is attributed to the guidance of our parents.
A. He’ｓcoming
B. If he is coming
C. That coming
D. Whether he’cｓoming
11. It ’_ｓ____ he’blle able to come.
A. doubt whether B. doubtful C. doubt it D. doubtful whether
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 is + 过去分词 +从句
It is said that 据说…… … It is reported that 据报道…… … It has been proved that 已证明… ……
eg:Where we should leave it is a problem.
When they will come hasn
’ t been made pubic.
他们什么时候来还不知道。
三 .注意点 :
1.it 做形式主语 ,而将主语从句放在句末（尤其是当谓语较短时） 。 例如： That light travels in straight lines is known to all. 光沿直线传播，这是众所周知的事。
whatever 引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分
).
例如： What you need is more practice.
你所需要的是更多的训练。
What I want to know is this. 我想知道的就是这事。 Whatever we do is to serve the people. 我们无论做什么都是为人民服务。 （ 4）用连接副词 when, where, why, how 引导的名词性从句 (其连接副词有含义 ,在句中作状语。 )