主语从句讲解及其练习Word文档下载推荐.docx

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主语从句讲解及其练习Word文档下载推荐.docx

(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,其连接代词在句中起名词性作用,担当一定成分.

Whatyouneedismorepractice.

Whateverwedoistoservethepeople.

要注意和whatever,whoever引导的让步状语从句的区别。

如:

Whoeverbreaksthelawshouldbepunished.(主语从句)

(=Anyonewhobreaksthelawshouldbepunished.)

Whoeverbreaksthelaw,heshouldbepunished.(让步状语从句)

(=Nomatterwhobreaksthelaw,heshouldbepunished.)

(3)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:

Whereweshouldleaveitisaproblem.

三、it作形式主语的主语从句

有时为了考虑句子平衡,通常在主语从句处使用形式主语it,而将真正的主语从句移至句末。

这分四种情况:

(1)对于以连词that引导的主语从句,通常用形式主语it替代主语从句:

<

a>

Itis+名词+从句

Itisafactthat…事实是……;

Itisgoodnewsthat………是好消息;

Itisaquestionthat………是个问题;

Itiscommonknowledgethat……是常识

类似的名词还有:

apity;

awonder;

agoodthing;

nowonder(难怪);

surprise等。

Itiscommonknowledgethatthewhaleisnotafish.

ItisnosurprisethatBobshouldhavewonthegame.

<

b>

Itis+形容词+从句

Itisnecessarythat…有必要……;

Itisclearthat…很清楚……;

Itislikelythat…很可能……;

Itisimportantthat…重要的是……

类似的形容词还有:

strange;

natural;

obvious;

true;

good;

wonderful;

possible;

unlikely;

unusual;

certain;

evident(明显的);

worth-while(值得的);

surprising;

interesting;

astonishing(令人惊讶的),etc.

2.Itisessentialthatheshouldbeherebytheweekend.

3.Itseemsobviousthatwecannotgoonlikethis.

4.Itisnecessarythatyou(should)masterthecomputer.

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。

c>

Itis+过去分词+从句

Itissaidthat…据说……;

Itisreportedthat…据报道……;

Ithasbeenprovedthat…已证明……;

Itmustbeprovedthat…必须指出……

类似的过去分词还有:

known;

expected;

believed;

thought;

hoped;

noted;

discussed;

required;

decided;

suggested;

demanded;

madeclear;

foundout,etc.

Itisusedtobethoughtthatanewstarmustbeduetoacollisionbetweentwostars.

Ithasnotbeenmadeclearwhenthenewroadistobeopenedtotraffic.

d>

Itseems/happened(碰巧)/appears/doesn’tmatter/makesnodifference(关系不大)/…that…主语从句不可提前

Itneveroccurredtomethat...我从来没想到......

Itmakesnodifferencewhetherhewillattendthemeetingornot.

ItdoesnotmatterifImissedmytrain.

IthappenedthatIsawhimyesterday.

(2)对关系代词型what引导的主语从句,通常直接将主语从句放在句首。

Whatweneedismoney.我们需要的是钱。

WhatIwanttoknowisthis.我想知道的就是这一点。

有时也可将助用形式主语。

Itisclearenoughwhathemeant.他是什么意思很清楚。

四、连词that的省略问题

引导主语从句的连词that有时可省,有时不能省,其原则是:

若that引导的主语从句直接位于句首,则that不能省略;

若that引导的主语从句位于句末,而在句首使用了形式主语it,则that可以省略:

Thatyoudidn’tgotothetalkwasapity.很遗憾你没去听报告。

(that不可省)

Itwasapity(that)youdidn’tgotothetalk.很遗憾你没去听报告。

(that可省)

5、高考题:

1、Itneveroccurredtome___youcouldsucceedinpersuadinghimtochangehismind.(陕西高考)

A.whichB.what

C.thatD.if

2It'

sobvioustothestudents________theyshouldgetwellpreparedfortheirfuture.(天津卷)

A.asB.thatC.whichD.whether

3、________somepeopleregardasadrawbackisseenasaplus(好处,优点)bymanyothers.(2010·

北京)

A.Whether B.What  C.That  D.How

4、Itisuncertain________sideeffectthemedicinewillbringabout(引起),althoughabouttwothousandpatientshavetakenit.(2010·

浙江)

A.thatB.howC.whatD.whether

主语从句练习题

1.________makesmistakesmustcorrectthem.

A.WhatB.ThatC.WhoeverD.Whatever

2.Itworriedherabit____herhairwasturninggrey.

A.whileB.thatC.ifD.for

5.________Tomlikedtoeatwasdifferentfrom________.

A.That…thatyouhadexpectedB.What…thatyouhadexpected

C.That…whatyouhadexpectedD.What…whatyouhadexpected

6.________wegoswimmingeveryday________usalotofgood.

A.If...doB.That...do

C.If...doesD.That...does

7.It________Bobdrivesbadly.

A.thinksthatB.isthoughtwhatC.thoughtthatD.isthoughtthat

8.It'

suncertain________theexperimentisworthdoing.

A.ifB.thatC.whetherD.how

9.________theboydidn'

ttakemedicinemadehismotherangry.

A.ThatB.WhatC.HowD.Which

10.____wecan'

tgetseemsbetterthan____wehave.

A.What,whatB.What,thatC.That,thatD.That,what

11.____youdon'

tlikehimisnoneofmybusiness.

A.WhatB.WhoC.ThatD.Whether

12..____we'

llgocampingtomorrowdependsontheweather.

A.IfB.WhetherC.ThatD.Where

13._________isgoingtodothejobwillbedecidedbythePartycommittee.

A.ThatB.WhyC.HowD.Who

14._______we'

llfinishtranslatingthebookdependsonthetime.

A.WhenB.WhyC.WhatD.That

15.______hewon'

tgothereiscleartoallofus.

A.HowB.WhatC.Wh

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