-ZiqiuCenterMiddleSchoolQuQunli一.如果主句是一般将来时态，if引导的从句通常用一般现在时态。1.Ifyoucometotheparty,youwillhaveagoodtime.Youwillhaveagoodtimeifyoucometotheparty.2.Ifhestudiesharder,hewillgetbettergrades.Hewillgetbettergradesifhestudiesharder.二.如果主句含有can,may,must等情态动词时，if引导的从句通常用一般现在时态。1.Ifyoudrivetoofast,youmayhaveanaccident.Youmayhaveanaccidentifyoudrivetoofast.2.Ifyouwanttokeephealthy,youshouldeatlessjunkfood.Youshouldeatlessjunkfoodifyouwanttokeephealthy.三.如果主句是祈使句，if引导的从句通常用一般现在时态。1.Don’twaitformeifIamlate.IfIamlate,don’twaitforme.2.TellTomtocomehereifhestillhasproblems.IfTomstillhasproblems,tellhimtocomehere.练一练1.如果他迟到了会发生什么事情？What_______________ifheislate?2.如果努力学习，你就会取得好成绩。Ifyou___________________,you__________goodgrades.3.他如果看电视太久了，他的父母会不高兴。Ifhe_______TVtoomuch,hisparents_______unhappy.4.如果明天不下雨，我可以和你一起去公园。Ifit______________tomorrow,I______________totheparkwithyou.willhappenstudyhardwillgetwatcheswillbedoesn’trainmaygoThankyou!
