if引导的条件句.ppt

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1、GrammarIf…Itwillbesunnytomorrow.Findtherule(1)Wewillhaveapicnictomorrow.Findtherule(1)Wewillhaveapicnicifit’ssunnytomorrow.Itwillbesunnytomorrow.Wewillhaveapicnictomorrow.IwilltakepartintheEnglishcompetition.Findtherule(2)Dadwillbuyapenforme.Findtherule(2)DadwillbuyapenformeifItakepartint

2、heEnglishcompetition.IwilltakepartintheEnglishcompetition.Dadwillbuyapenforme.Wewillgotothepark.Itwon’traintomorrow.Wewillgototheparkifitdoesn’traintomorrow.Findtherule(3)if条件状语从句中，主句用一般将来时，从句用一般现在时表示将来。Ifyouwon’thurryup,youwillmisstheearlybus.Ifyoudon’thurryup,youwillmisstheearlybus.What

3、’stherule?（1）Ifyou...,youwill...if条件状语从句中，如果主句有must，can，may等情态动词，从句用一般现在时。Youmuststopifthetrafficlightisred.Youmaygofishingifyouarefree.Hecangohomeifhefinisheshishomework.What’stherule?（2）if条件状语从句中，如果主句是祈使句，从句用一般现在时。Letmeknowifhecomes.Don’twaitformeifIamlate.Putupyourhandsifyouhaveanyques

4、tions.What’stherule?（3）2.If条件状语从句中，如果主句有must，can，may等情态动词，从句用一般现在时。（主情从现）3.If条件状语从句中，如果主句是祈使句，从句用一般现在时。（主祈从现）1.If条件状语从句中，主句用一般将来时，从句用一般现在时表示将来。（主将从现）Rules3.IfMary(buy)thebook,shewilluseupallhermoney.1.IfI(be)free,I’llvisitmyauntnextSunday.4.IfI(study)hard,I’llwintheEnglishcompetition.2.If

5、it(be)coldtomorrow,Iwillwearmysweater.amisbuysstudyExercise(1):5.IfaUFO(land)infrontofme,I(go)intolookforthealien.landswillgohappyA:Whatwillyoudoifyouarehappy?B:Iwill…ifIamhappy.singasong/goshopping/watchTV/visit…/…Exercise(2):1.Callmeiftheboss(willcome/comes).comes2.Shemustseeadentistifs

6、he(has/willhave)atoothache.has3.Haveagoodrestifyou(willbe/are)tired.are4.Youcangoshoppingwithyoursisterifyou(have/willhave)timethisafternoon.have5.Ifthere(willbe/is)acaraccident,they(willcall/call)110atonce.iswillcallsadＡ:Whatwillyoudoifyouaresad?B:Iwill…ifIamsad.cry/talktomyparents/sleep

7、/…Fillintheblankswiththewordsgiven.Ifyouhelpothers,everyone_________(help)you.Ifhe___________(eat)muchmeat,he’llbeheavy.Ifit_______(rain),she_____________(read)booksathome.Ifyouplaycomputergamestoomuch,you_________(be)tired.Ifyou_________(bring)snackstoschool,thetea