主语从句练习（共五篇）
第一篇：主语从句练习
向榜样学习
主语从句讲解及练习
主语从句
宝宝喉炎的症状一、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。例如：That you will win the medal ems 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。
例如：Whether she is coming or not doesn’t matter too much.她来不来都无关紧要。
（3）用连接代词引导的主语从句(在由连接代词who, who, whom, which, what, whoever, whomever, whichever, 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 rve the people.我们无论做什么都是为人民服务。
（4）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。)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。
=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。
车子仪表盘= It has not been announced when the plane is to take off.还没有宣布飞机何时起飞。
(当what引导的主语从句表示“…的东西”时，一般不用it作形式主语。)错:It is a book what he wants.对:What he wants is a book.他想要的是本书。
例如：Has it been ttled who will be nt to carry out the task ? 谁将被派去执行这项任务决定了吗 ？ 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； surpri等。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 surpri 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 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 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。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 refud to talk to you.他拒绝和你说话真是令人惊讶。
It is esntial that he should be here by the weekend.周末之前，他应该到这里是必要的。It ems 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…… It must be proved that… 必须指出……
类似的过去分词还有：known;estimated;expected;believed;thought;hoped;noted;discusd;required;decided;suggested;demanded;made clear;found out,etc.例如：It is thought that he is the best player.大家都认为他是最好的选手。
介绍自己简历
身边的风景It is estimated that the va is 2000 years old.据估计这个花瓶有2000年的历史。显陵
It is ud 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。
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 misd my train, becau there is another later.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 does not interest me whether you go or not.我对你去不去不感兴趣。
2.只用whether不用if引导主语从句.填空1 1._____ as much as one-fifth of all timber harve
sted is not ud.2._____ some mammals came to live in the a is not known.3._____ we have achieved is attributed to the guidance of our parents.4._____ wealthy does not necessarily mean that a man is greedy.5.Although _____ happened in this developed country sounds like science fiction, it could occur elwhere in the world.6._____ she had forgotten to take her notebook.7.I am sure that _____ she said is wrong.8.We lost our way in the forest, and _____ made matters wor was that it was getting dark.9._____ some mammals came to live in the a is not known.10._____ or not is still uncertain.11.It’s _____ he’ll be able to come.12._____ he is at work in the heart of the big city or at home in the quiet suburb, Dick’s life is tied to machines.13._____ he saw both surprid and frightened him.14._____ is a spell of warm sunshine.15._____ is a pity that he should feel so upt.16._____ a spoonful of soil can tell us so much about the structure and early history of the moon.17._____ you nominate will be elected.18._____ book you borrow must be returned within a week.19._____ of us gets home first starts cooking.20._____orders he gives are obeyed.填空2 1.________ makes mistakes must correct them.2.It worried her a bit ____ her hair was turning grey.3.When and why he ca
me here ________ yet.4.________ is no reason for dismissing her.5.________ Tom liked to eat was different from ________.6.________ we go swimming every day ________ us a lot of good.7.It ________ Bob drives badly.8.It's uncertain ________ the experiment is worth doing.9.________ the boy didn't take medicine made his mother angry.10.____ we can't get ems better than ____ we have.11.____ you don't like him is none of my business.12..____ we'll go camping tomorrow depends on the weather.13._________is going to do the job will be decided by the Party committee.14._______we'll finish translating the book depends on the time.15.______he won't go there is clear to all of us.16.______the hou will be built will be discusd at tomorrow's meeting.17.._______you come or not is up to you.18.._______makes mistakes must correct them.19.._______team will win the match is a matter of public concern.20..________leaves the room last ought to turn off the lights.A.is not known C.The fact that she was a few minutes late D.What…what you had expected 主语从句练习题 [即学即用 ] I.用适当的词填空,使句子意思完整。
1.______ he didn’ t attend the meeting yesterday wasn’ t quite clear.2.The Foreign Minist
er said, “ It is our hope ______ the two sides will work towards peace.”
简单绘画3.______ team will win the match is still unknown.4.______ comes to the party will receive a prent.5.______ Mary has left is still a question.6.It ’ s reported ______ three people were killed in the accident and five were hurt badly.7.______ he solved the problem successfully interested all of us.8.We usually think ______ we can’ t get ems better than what we have.9.It is a fact ______ English is being accepted as an international language.10.______ is to be nt there to solve the problem hasn ’ t been decided.II.下列各句中均有一处错误,请改正。
1.That the old man ’ s son wanted to know was where the gold had been hidden.2.It is reported when China has successfully nt Shenzhou VI spaceship into space.3.If he can finish his task on time is of great importance.4.Whether the 2008 Olympic Games will be held in Beijing excited the whole nation.5.After Yang Liwei succeeded in circling the earth, which our astronauts desire to do is walk in space.6.Whatever leaves the room last ought to turn off the lights.7.Why they will solve the rious problem today has not been decide
老泪纵横的意思
d.8.When will win the English competition is still a problem.9.How our spring sports meet will be held or not this week is not known yet.10.It’ s strange when he should have gone away without telling us.GRAMMAR 主语从句学习指导
