If引导的条件状语从句

If引导的条件状语从句例句：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”I’llgotoseeyouifIamfreenextweek.Iwanttoknowifheisateacher.whether1.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=Ifitdoesn’train,Iwillgoouttomorrow.Iwillgoouttomorrowifitdoesn’train.Idon’tknowifthetrainhasarrived.1.Canyoutellmeifshecancometothemeeting?2.Shewillnotgothereifitisrainytomorrow.3.Ican’tguessifshewillbeangry.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.doesn’trainwillbe2.Ifit,we’llholdit.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;willbe1wedon’tknowifit_____tomorrow,ifit___,wewon’tgohiking.(snow)2Thesenseofhappinesswillincreaseifyou____whatyouliketodo.(do)3Ifshe_______________(notget)upearly,she’llmisstheearlybus.4bequick,please,oryouwillbelateforschool.___you____quick,youwillbelateforschool.1.Ifyou_____totheparty,you’llhaveagreattime.A.willgoB.wentC.goD.going2．I____hertheanswerifshe____me.A.cantell,willaskB.willtell,willaskC.wouldtell,askD.willtell,asksCD3.–Whatareyougoingtodotomorrow?--We’llgotothelibrarytomorrowifit___.A.isn’trainB.rainC.won’trainD.doesn’train4.Whatwillyoudoifyou_____totheoldfolk’shomevisit?A.goB.wentC.goingD.willgoAD