If引导的条件状语从句

If引导的条件状语从句,语法：,例句：Ifpeopleobeythetrafficrules,therewillbefeweraccidents.,if引导的条件状语从句,if:从属连词，意思是：“如果，假如，倘若”,从句,主句,Therewillbefeweraccidentsifpeopleobeythetrafficrules.,原句可改为：,if引导的条件状语从句既可以放在句子前，也可以放在句子后。从句位于主句之前时，常用逗号将其与主句隔开。,结构：,Ifitrainstomorrow,Iwillstayathome.,Ifyouarehard-working,yourparentsmayfeelhappy.,Studyhard,ifshewantstogetgoodgrades.,主将从现，主情从现主祈从现，,if引导的条件状语从句和if引导的宾语从句的区分:,If在宾语从句中翻译为“是否”If在条件状语从句中翻译为“如果”,IllgotoseeyouifIamfreenextweek.,Iwanttoknowifheisateacher.,whether,1.if在句中的含义不同,2.if在从句中的位置不同,If引导的宾语从句放在主句之后；而if引导的状语从句可放在主句之前也可放在主句之后,=Ifitdoesntrain,Iwillgoouttomorrow.,Iwillgoouttomorrowifitdoesntrain.,Idontknowifthetrainhasarrived.,找出下列句子中哪些是if条件状语从句，哪些是if宾语从句,1.Canyoutellmeifshecancometothemeeting?2.Shewillnotgothereifitisrainytomorrow.3.Icantguessifshewillbeangry.4.Ifwehelpeachother,webothwillgetgoodresults.,3.时态要求上有区别：口诀,If引导条件状语从句的时态为一般现在时记住“主将从现”,1.Iwanttoknowifthereasportsmeetingnextmonth.,doesntrain,willbe,2.Ifit,wellholdit.,If引导的宾语从句的时态由主句及本身时态决定；,If是否，一般将来；if如果，一般现在,-Sam,doyouknowifAlice_tomypartynextweek?-Ithinkshewillcomeifshe_free.Acomes;isBwillcome;willbeCwillcome;isDcomes;willbe,If引导的条件状语从句的练习,1wedontknowifit_tomorrow,ifit_,wewontgohiking.(snow)Thesenseofhappinesswillincreaseifyou_whatyouliketodo.(do)3Ifshe_(notget)upearly,shellmisstheearlybus.4bequick,please,oryouwillbelateforschool._you_quick,youwillbelateforschool.,1.Ifyou_totheparty,youllhaveagreattime.A.willgoB.wentC.goD.going2I_hertheanswerifshe_me.A.cantell,willaskB.willtell,willaskC.wouldtell,askD.willtell,asks,C,D,3.Whatareyougoingtodotomorrow?-Wellgotothelibrarytomorrowifit_.A.isntrainB.rainC.wontrainD