if四种条件句(课堂PPT)

1FIRSTSECONDTHIRDZERO2IfIamlateforschool,myteachergetsangry.IfclauseMainclauseIf+PresentsimplePresentsimple3IfIoversleep…4Imissthebus.5IfImissthebus,Iamlateforschool.6IfIamlateforschool,myteachergetsangry.7IfIgotoLondon,IwillseetheBigBen.IfclauseMainclauseIf+Presenttensewill/can/may/must+verb•8IfIgotoLondon…9IwillseetheBigBen.10IfIgotoBuckinghamPalace,IcantakeaphotooftheRoyalGuard.11IfyougotoLondon,youmustlookrightbeforecrossingastreet12IfclauseMainclauseIf+PastSimplewould/could/might+verbIfIwereanastronaut,Iwouldtravelinaspaceship.13IfIwereanastronaut,Iwouldtravelinaspaceship.14IfItravelledinaspaceship,IwouldgotoMars.15Nicetomeetyou!IfIwenttoMars,IwouldmeetaMartian.16IfImetaMartian,Iwouldn’tunderstandhim.?IfIaved17IfIdidn’tunderstandhim,IwouldcomebacktotheEarth.18IfIhadstudiedhard,Iwouldhavepassedmyexams.IfclauseMainclauseIf+PastPerfecttensewould/could/might+have+pastparticiple19IIfyouhadstudiedhard,youwouldn’thavefailedyourexam.20IIfyouhadpassedyourexam,youcouldhavegonetothebeach.21IIfIhadgonetothebeach,Iwouldhavemadesandcastles.