if条件状语从句和宾语从句公开课一等奖优质课大赛微课获奖课件.pptVIP

RevisionAdverbialClauseofConditionif引导条件状语从句宾语从句-----------复习课第1页第1页

Sheisdoingherhomework.Ifyouarehard-working,youwillgetgoodgrades.Shegetsgoodgrades.第2页第2页

Ifyouplaycomputergamesonweekdays,you’llbeverytiredinclassyourparentswillbesad.youwon’tgetgoodgrades.youreyeswillbepoor第3页第3页

1)条件状语从句通常由if或unless(=ifnot)引导,从句中惯用普通时代替未来时,即if或unless后句子谓语用普通现在时。但是,主句则通惯用未来时,情态动词或祈使句。时态－－主将从现主句普通未来时,从句普通现在时第4页第4页

1.假如主句是普通未来时,从句则用普通现在时。Ifitrains（从句）,Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone（从句）.2.假如主句含有must,may,can等情态动词,从句也要用普通现在时。Ifyoudrivetoofast,youmayhaveanaccident.Youmuststopifthetrafficlightisred.3.假如主句是祈使句,从句同样要用普通现在时。Don’tgoandplayfootballifyoudon’tfinishyourhomework.PleasecallmeifhecomesnextSunday.if条件状语从句结构及时态Revision第5页第5页

If引导条状语从句时,从句中用普通现在时代替普通未来时。1.Ifhe______(go)tothemovies,hewon’tfinishhiswork.goes2.IfI________(become)adoctor,Icanhelpothers.become3.Ifwe_______(have)time,wewillgototheparktomorrow.have4.假如你去,我也去。Ifyougo,Iwillgo.5.假如明天下雨,请带雨衣。raincoatPleasetakearaincoatifitrains.excellent第6页第6页

Ifyouarefreethisweekend,whatwillyoudo?IfIamfree,…sleepwatchTVplaycomputergamespractice第7页第7页

Ifyouwanttogetgoodmarks,

dowhat?Don’tdowhat?Ifyouwanttogetgoodmarks,__________.Ifyouwanttogetgoodmarks,don’t__________.studyhardlistentoteacherscarefully.dohomeworkbyyourself.copyyourhomework.talkintheclasscheatintheexams第8页第8页

If条件句替换形式:（1）祈使句+and/or+陈说句（谓语动词通惯用未来时态）。其中，and表示句意顺承；or表示转折，意为“不然”。e.g.Ifyouworkhard,you’llpasstheexameasily.=Workhard,andyou’llpasstheexameasily.Ifyoudon’tworkhard,you’llfallbehindothers.=Workhard,oryou’llfallbehindothers.verygood第9页第9页

（2）用介词with,without替换形式:e.g.Ifthereisnowat