主语从句讲解及其练习Word文档下载推荐.docx
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(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