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1、人教版新目标八年级英语上册Iftheconditionaladverbialclauses学校：彭阳第四中学姓名：李淑萍一、UsagesWeuseiftheconditionaladverbialclausetotalksomethingmayhappeninthefuture.Theclausecanbeplacedinfrontofmainsentenceorafterthemainsentence.Ifitisplacedinfrontofthemainsentence，thereisac
2、ommabetweenthem.e.g.Ifyouaskhim,hewillhelpyou.ifclausemainsentenceHewillhelpyouifyouaskhim.mainsentenceIfclause注：从前“逗”主注：“主前无需”“逗”二、TenseWhenthemainsentenceisinthreecases,theclauseusesthesimplepresenttenseinsteadofthesimplefuturetense.1.Whenthemains
3、entenceisthesimplefuturetensee.g.Ifheruns,he'llgetthereintime.2.Whentheverbofthemainsentencecontainscan,may,must,should,etce.g.Ifitstopssnowing,wecangoout.3.Whenthemainsentenceisanimperative.e.g.Pleasebequietiftheteachercomes.三、Expansion1.”if“alsomea
4、ns“whetherornot”,mainlyusedinobjectclauses.e.g.：Idon'tknowifhewillcometomorrow.Ifhecomes,Iwilltellyou.2.iftheclausecanbeturnedintoanimperativesentence.Ifanifclauseisanegative,itcanbetranslatedintoanimperativesentence+orasentence.e.g.:Ifyoutryyourbes
5、ttodoit,you'llfinditeasy.=Tryyourbesttodoit,andyou'llfinditeasy.Ifyoudon'tstudyhard,youwon'tgetgoodgrades.=Studyhard,oryouwon'tgetgoodgrades.3.“Unless,aslongas”alsocanbeusedtomakeadverbialclause，Unless=if...not意为“如果不，除非”；aslongas意为“只要”。e.g.Unlessit
6、rainstomorrow,we'llgotothefarm.=Ifitdoesn'traintomorrow,we'llgotothefarm.Aslongasyouarecareful,youwon'tmakesuchmistakes.4."Without+object"sometimescanbechangedtoconditionaladverbialclause.e.g.：Fishwilldiewithoutwater.=Ifthereisnowater,fishwilldie.四、
7、Formula(口诀)If条件句不一般，几个要点记心间；条件句，放在前，逗号要放句中间；条件句，表可能，主句多用将来时；条件句，表事实，主句常用现在时。五、Haveatry1.如果他迟到了会发生什么事情？What___________ifhe______late?2.如果努力学习，你就会取得好成绩。Ifyou______________,you__________goodgrades.3.如果下雨，请关上窗户。Ifit_____,pleaseclosethewindows.4.如果你有任何问题，
8、你可以举手问我。You___________upyourhandsifyou_____anyquestions.5.如果明天不下雨，我会和你一起去公园的。Ifit______________tomorrow,I________gototheparkwithyou.willhappenisworkhardwillgetrains__canhavedoesn'trainwill=Workhard,andyouwillgetgoodgrades.putThankyou!
