高二主语从句练习_高中主语从句练习题
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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.主语从句主要有四类：（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 seems unlikely.That you are so indifferent bothers me.That she survived the accident is a miracle.（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。
注意：引导主语从句，不能用if，只能用whether。
例如：Whether we will hold a party in the open air tomorrow depends on the weather.Whether she is coming or not doesn’t matter too much.（3）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，其连接代词在句中起名词性作用，担当一定成分.例如：What you need is more practice.What I want to know is this.Whatever 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义。它引导主语从句，并在从句中作主语、宾语、表语等。
whatever = anything that;whoever = anyone who。要注意和whatever, whoever引导的让步状语从句的区别。
如： Whoever breaks the law should be punished.（主语从句）
（＝Anyone who breaks the law should be punished.）
Whoever breaks the law, he should be punished.（让步状语从句）
（＝No matter who breaks the law, he should be punished.）
（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。)例如:Where we should leave it is a problem.When they will come hasn’t been made pubic.三.由 it构成的主语从句
（1）由连词that引导的主语从句，在大多数情况下会放到句子的后面，而用代词it作形式主语。
例如：That light travels in straight lines is known to all.=It is known to all that light travels in straight lines.When the plane is to take off has not been announced.= It has not been announced when the plane is to take off.(但当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.另外，需要注意的是，it作形式主语代替主语从句时，要注意和as引导的定语从句的区别。试比较：
It was reported that the US was under the terrorist attack.As was reported, the US was under the terrorist attack.（2）常见用it作形式主语的复合句结构 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。例如：It is a mystery to me how it all happened.It is common knowledge that the whale is not a fish.It is no surprise that Bob should have won the game.It’s a pity that you mied the film.It is +形容词+从句
It is neceary 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;poible;unlikely;quite;
unusual;certain;evident;worth-while;surprising;interesting;astonishing, etc.例如：It is doubtful whether she will be able to come.It was really astonishing that he refused to talk to you.It is eential that he should be here by the weekend.It seems obvious that we can not go on like this.It is neceary 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.需要注意的是，这类主语从句中，谓语动词很多为“（should）＋动词原形”，即要用虚拟语气。
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;discued;required;decided;suggested;demanded;made clear;found out,etc.例如：It is thought that he is the best player.It is estimated that the vase is 2000 years old.It is used to be thought that a new star must be due to a collision between two stars.It has not been made clear when the new road is to be opened to traffic.It is said that he was killed in the earthquake.It seems（happened / appears / doesn’t matter / makes no difference / occurred …）that …：
It seems that they will win the game.It makes no difference whether he will attend the meeting or not.It does not matter if I mied my train.It happened that I saw him yesterday.练习
1._____ as much as one-fifth of all timber harvested is not used.A.The estimate
B.The estimated 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.Whoever B.Whatever C.However D.That 4._____ wealthy does not necearily mean that a man is greedy.A.For the reason that he is B.Just because he is 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.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 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.A.that B.which C.it D.what 9._____ or not is still uncertain.A.He’s coming B.If he is coming C.That coming D.Whether he’s coming 10.It’s _____ he’ll be able to come.A.doubt whether B.doubtful C.doubt it D.doubtful whether 11.______ 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.A.Whether B.Till C.If D.Unle 12._____ he saw both surprised and frightened him.A.That B.When C.What D.Which 13._____ is warm sunshine.A.What do we all need.B.What all we need C.What we need D.What we all need 14._____ is a pity that he should feel so upset.A.What B.That C.He D.It 15._____ a spoonful of soil can tell us so much about the structure and early history of the moon.A.Remarkable B.Quite remarkably C.It is remarkable that D.It is remarkable fact that 16._____ you nominate will be elected.A.Who B.Whom C.Whomever D.That’s 17._____ book you borrow must be returned within a week.A.What B.Which C.Whichever D.That’s 18._____ of us gets home first starts cooking.A.Who B.Which C.Whichever D.Anyone
1.It remains unknown ________ the peace talk between the two countries is going to lead.A．where
B．when
C．how
D．why 2.It is ________ the pupils do in their spare time ________ really prepares them to take their place in society as citizens when they grow up A.which;that
B.that;what
C.what;that
D.that;which 3._______ _ he can work abroad next year will depend on his parents' will.A.That
B.When
C.What
D.Whether
4.It is obvious to the students ______ they should get well prepared for their future.A.as
B.which
C.whether
D.that 5.It is usually thought ________ a little child says is truth.A．what that
B．that what
C．which
D．that 6.It was never clear________the man hadn't reported the accident sooner.A．that
B．how C．when
D．why 7.It could be learned from the teacher's eyes ________ he was very satisfied with her performance.A．that
B．whether
C．what
D．where 8.________ didn't attend the lecture yesterday won't be given full marks.A．Any one
B．Whoever
C．Who
D．The person 9.It surprised us all ________ Kate made such big progre in this final exam.A．when
B．that
C．how
D．whether 10.Before a problem can be solved, it must be obvious ________ the problem itself is.A．what
B．that
C．which
D．why 11.—What upsets him? —________ his computer is out of order.A．Whether
B．What
C．That
D．How 12.________ we go there by train or by ship makes no difference.The time and the fees are the same.A．Which
B．How
C．Whether
D．Why 13.________ I regret most is that I have promised to make friends with the dishonest girl.A．How
B．What
C．Where
D．That 14.So quickly are science and technology advancing ________ is a poibility today may be a reality tomorrow.A．which
B．what
C．that which
D．that what 15.________ left the door unlocked must be held responsible for the accident.A．Whomever
B． Whoever
C．Whatever
D．Whenever1、The Foreign Minister said, “______ our hope that the two sides will work towards peace.”
A.This is B.There is C.That is D.It is
2、After Yang Liwei succeeded in circling the earth, _____ our astronauts desire to do is walk in space.A.where B.what
C.that D.how3、____ is not known yet.A.When she has gone B.Where she has gone C.How did she leave D.Why did she go4、______ is unfit for the office.A.It seems to me that B.It seems to me that he C.That seems he
D.That seems to him that5、_______man must fear when traveling in space is radiation from the sun.A.Which B.How C.What D.That
6、_______ beat Xiao Wang black and blue is not known.A.Whom
B.Whoever
C.Who
D.What7、________matters much ________ the headmaster supports our activity.A．It;whether B．What;whether C．As;that D．That;if8、________ is known to us all is that the Chinese government has spared no efforts to protect people from fake food.A．As
B．It C．That
D．What9、________ Premier Wen Jiabao visited the United States led to the closer relationship between the two countries.A．Which B．What C．That D．As10、It is obvious to the students ________ they should get well prepared for their future.A．as B．which C．whether D．that11、It is uncertain________side effect the medicine will bring about，although about two thousand patients have taken it.A.that B.what
C.how D.whether12、The villagers have already known ______ we'll do is to rebuild the bridge.A．this B．that C．what D．which13、It is still under discuion________the old bus station should be replaced with a modern hotel or not.A．whether B．when
C which D．where14、________ Barbara Jones offers to her fans is honesty and happine.A.Which B.What C.That D.Whom15、It was never clear ________ the man hadn't reported the accident sooner.A.that B.how C.when D.why
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