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主将从现是指在时间状语从句和条件状语从句中，如果主句是一般将来时，从句用一般现在时替代一般将来时。•什么是主将从现？if:Ifyouaskhim,hewillhelpyou.•引导条件状语从句的词有哪些？unless:I’llgotheretomorrowunlessitrains.when,while,before,after,untill,till,since,assoonas,•引导时间状语从句的词有哪些？1.主将从现2.主祈从现3.主情从现•主将从现有哪些内容？主句是一般将来时，从句用一般现在时。WhenIgrowup,I’llbeadoctor.Ifyougototheparty,youwillbehappy.•1.主将从现主句是祈使句，从句用一般现在时。Don’tlaughatmewhenImakeamistake.•2.主祈从现主句中含有情态动词，从句用一般现在时。Youshouldbequietwhenyouareinthereadingroom.•3.主情从现Exercise1.IfIcome,I________(see)you.2.Ifitisfine,we______(go)forawalk.3.Ifitrains,they_________(stay)athome.4.Youwillspoilitifyou______(notbe)careful.willseewillgowillstayaren’t5.Wewillbeverymuchpleasedifyou_____(come).6.WillyouhelpmeifI_____(need)you.7.Theywillgetwetifit____(rain).8.Wewillanswerifwe___(can).9.Ifyoueattoomuch,you______(get)ill.comeneedrainscanwillget()10.---WhatwillBilldoifhe____inthetest?---Hewilltryagain.A.failB.failsC.willfailD.isfailing()11.Pleasetellherthenewswhenshe_____.OK,Iwill.A.comesB.willcome.C.comeD.wouldcomeBA()12.Thestudentswillplanttreesifit___tomorrow.A.didn’trainB.hasn’trainedC.won’trainD.doesn’train()13.We__homeifthereisnobus.---Oh,whatapity!A.willwalkB.havewalkedC.walkedD.walkDA()14.Ifit_____tomorrow,I’llgobycar.A.rainB.willrainC.rainsD.wouldrain()15.IfMary____nextSunday,wewillgoboatingtogether.A.willcomeB.comesC.shallcomeD.shouldcomeCB()16.---Don’tforgettoaskhimtowritetome.---Iwon’t.Assoonashe____,I’llaskhimtowritetoyou.A.willcomeB.cameC.comesD.iscomingC()17.---CanIgotoBeijingformyholiday,Dad?---Youcanwhenyou_______abitolder.A.willgetB.getC.aregettingD.got()18.Ifhe_______harder,hewillcatchupwithussoon.A.studyB.studiesC.willstudyD.studiedBB()19.Frank____toseehisgrandmaifhe__freetomorrow.A.willcome;willbeB.comes;isC.willcome;isD.comes;willbeA