if引导的条件状语从句中考解析.doc
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If引导的条件状语从句
[课本链接]
Ifyoudo,you’llbesorry.(Unit5,SectionA)
[定义]
条件状语从句通常由if(如果),unless(除非),aslongas(只要)引导。
if引导的条件状语从句表示假如从句的动作发生,主句的动作就(不)会发生。
[句子结构]
中考考点之[时态呼应]
在复合句中:
⑴当主句是一般现在时或是一般将来时时;
(2)当主句是祈使句时;
(3)当主句含有情态动词时,if引导的条件状语从句通常用一般现在时。
如:
例句:
Ifshedoesn’tcome,shewillbesorry.如果她不来,她会遗憾的。
Haveagoodrestifyouaretired.如果累了,你就好好休息一下。
Wemuststudyhardifwewanttopassthefinalexam.如果想通过期末考试,我们必须努力学习。
[同义句转换]
1.If引导的条件状语从句可以用“祈使句,+and/or+一般将来时的句子”转换。
祈使句,+and+陈述句可以转化为if引导的肯定条件状语从句。
祈使句,+or+陈述句可以转化为if引导的否定条件状语从句。
如:
Ifyouworkhard,you’llpasstheexameasily.→Workhard,andyou’llpasstheexameasily.努力学习,你将很容易通过考试。
Ifyoudon’thurryup,you’llmissthetrain.→Hurryup,oryou’llmissthetrain.快点儿,否则你就赶不上火车了。
真题 (2010重庆中考)Workhard,________youmaycatchupwithyourclassmatessoon.
A.or B.but C.and D.yet
课后练习:
用if连接下列句子
1、Gotobedearly,andyouwillhaveagoodrest.
2、Hurryup,oryou’llmissthebus.
2.用含介词with或without的介词短语转换。
如:
Ifthereisnowater,fishcan’tlive.→Fishcan’tlivewithoutwater.离开水,鱼不能生存。
[if引导的条件状语从句和宾语从句的区别]
if可以用来引导宾语从句也可以用来引导条件状语从句,主要是要弄清if引导从句的时态。
if在引导宾语从句时,意为“是否”。
要根据实际情况来确定时态,并且一般将来时用will+V.原形;
而if在引导条件状语从句时意为“如果,假设”,要用一般时代替将来时,即“主将从现”。
e.g.Iwanttoknowifhewillcomeheretomorrow.我想知道他明天是否到这儿来。
(if在上句引导的是宾语从句,从句中有很明显的表将来的时间状语tomorrow,所以if从句要用一般将来时。
)
e.g.Ifitrainstomorrow,we’llputoffthesportsmeeting.如果明天下雨,我们就推迟运动会。
(if在上句引导的是条件状语从句,尽管从句中也有表将来时的时间状语tomorrow,从理论上讲也应该用一般将来时,但是在if引导的条件状语从句中要用一般现在时代替一般将来时,故从句谓语用rains而不用willrain.)
典题分析
1、(2010上海)Wewillhavenowatertodrinkwedon’tprotecttheearth.
A.untilB.beforeC.thoughD.if
2、(2011重庆)Wewillplanttreestomorrow,andIdon’tknowTomwillcomeandjoinus.
A.ifB.whichC.whatD.where
3、—Doyouknowiffinishedthework?
—Notyet.Ifhe,hewillgivemeacall.
A.he’s,willfinishB.he’ll,finishes
C.he’s,finishesD.he’ll,willfinish
Homework
一、用if连接下面的句子:
1、Youdonotunderstandthearticle.Askyourteacher.
2、Youwanttoknowmoreaboutit.Pleasecallyourteacher.
3、Tellhimtomakeaphonecalltome.Hewillcomeheretomorrow.
4、Youwanttogo.Pleasetellme.
5、Lookatourwebsite.Thecameradoesnotwork.
二、用所给的提示词组成一个if引导的条件状语从句。
1、betired,havearest(Tom)
2、notgotobedearly,feelsleepy(you)
3、becomeunhealthy,noteatvegetables(children)
4、notlistentotheteacher,notstudywell(I)
5、fallbehindothersinstudying,spendtoomuchtimeonthegames(DaWei)
三、单项选择:
1.Youaresuretopasstheexam___youstudyhard.
A.ifB.thoughC.thatD.since
2.I'llgotoseethefilmwithyou___Ihavetimethisevening.
A.whetherB.soC.ifD.when
3.___youstudyharder,you'llneverpassthefinalexam.
A.IfB.UntilC.UnlessD.Except
4.We’llstayathomeifit______thisafternoon.
A.rain B.rainsC.torain D.raining
5.WewillgototheGreatWallifit______tomorrow.
A.won’trainB.isn’trainingC.rained D.doesn’train
6.—Idon’tknowifhe______.
—Hewillcomeifit______.
A.comes;won’train B.willcome;doesn’train
C.comes;doesn'train D.willcome;won’train
7.Doyouknowwhattime______?
A.thetrainleave B.doesthetrainleave
C.willthetrainleave D.thetrainleaves
8.Doyouthinkif______anEnglishfilmtomorrownight?
A.isthere B.thereisgoingtohave
C.thereisgoingtobe D.willtherebe
9.Willyoupleasetellme______?
A.wherePudongAirportisB.howfarPudongAirportwas
C.howcanwegettoPudongAirport D.whenwasPudongAirportbuilt
10.—Mikewantstoknowif______apicnictomorrow.
—Yes.Butifit______,we’llvisitthemuseuminstead.
A.youhave;willrain B.youwillhave;willrain
C.youwillhave;rains D.willyouhave;rains
11.—Whydidn’tNickcometoschoolyesterday?
—______hewasill.
A.After B.WhereC.When D.Because
12.Thisboxis______heavy______Ican’tcarryit.
A.too;to B.so;thatC.very;that D.too;that
13.Idon’tknow______hestillliveshere.
A.where B.whatC.when D.whether
14.---Doyouknowifhe_______toplaybasketballwithus?
---Ithinkhewillcomeifhe______freetomorrow.
A.comes;isB.comes;willbeC.willcome;isD.willcome;willbe
15.Inthezooifachild_____intothewaterandcan’tswim,thedolphinsmaycomeup______him.
A.willfall;tohelpB.falls;tohelpC.willfall;helpD.falls;helping
16.Inthebookshop,areaderaskedtheshopkeeper___WhoMovedMyCheesewasaninterestingbook.
A.that B.how C.what D.if
17、Iwanttoknow________youhaveabrother.
A.ifB.thatC.thoseD.them
18、Wewillgohikingifittomorrow.
A.willbefineB.isfineC.befineD.isgongtobefine
19、Maybeyouifyoumakesomebadfriends.
A.gowrongB.willgowrongC.goingwrongD.isgoingtobewrong
20、—Doyouknowiffinishedthework?
—Notyet.Ifhe,hewillgivemeacall.
A.he’s,willfinishB.he’ll,finishesC.he’s,finishesD.he’ll,willfinish
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