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1、主将从现定义：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。引导条件状语从句的词if:Ifyouaskhim,hewillhelpyou.unless:I’llgotheretomorrowunlessitrains.引导时间状语从句的词when,while,before,after,untill,till,since,assoonas,1.主将从现主句是一般将来时，从句用一般现在时。WhenIgrowup,I’llbeadoctor.Ifyougototheparty,youwillbehappy.l2.主祈从现主句是祈使句，
2、从句用一般现在时。Don’tlaughatmewhenImakeamistake.Putitinyourdiarybeforeyouforget.用记事本记下免得忘了。l3.主情从现主句中含有情态动词，从句用一般现在时。Youshouldbequietwhenyouareinthereadingroom.Ababydeercanstandassoonasit’sborn.小鹿一生下来就能站着。Youcangetabetterjobifyouspeakaforeignlanguage.要是你会说一种外语，那你就会找到更好的工作。通常出现情况1.“主将从现”见于时间状语从句Assoo
3、nasIgetthroughwithmyworkI’lljoinyou.我工作一做完就来找你们。Beforetheydriveanyofthebuses,theywillhavetopassaspecialtest.然而在驾驶公共汽车前,他们必须通过专门测验。MymotherwillbeveryangrywithmewhenshefindsoutwhereI’vebeen.我母亲要是知道我到过那地方一定会大怒。We’llpayyouhalfupfrontandtheotherhalfwhenyou’vefinishedthejob.我们先付给你一半钱，剩下的一半等你干完了再付。
4、2.“主将从现”见于条件状语从句If(itis)necessaryIwillcomeat6.如有必要，我6点钟来。IftodayisWednesday,thedayaftertomorrowwillbeFriday.今天要是星期三，后天就是星期五。Ifyoutrainhard,you’llmakeagoodfootballer.你要刻苦训练就能成为优秀的足球运动员。Ifpastexperienceisanythingtogoby,theplanewillbelate.过去的经验要是还靠得住的话，这飞机会晚点的3.“主将从现”见于让步状语从句We’llgoevenifitrains
5、.即使下雨我们也去。He’llcomeevenifhe’si11.他即使生病也会来。Evenifhehadthemoney,hewouldn’tbuyit.他即使有钱也不会买它。He’llprobablysayno,thoughit’sworthtrying.他很可能不同意，但不妨去试探一下【Exercise】1.IfIcome,I________(see)you.2.Ifitisfine,we______(go)forawalk.3.Ifitrains,they_________(stay)athome.4.Youwillspoilitifyou______(notbe)car
6、eful.5.Wewillbeverymuchpleasedifyou_____(come).6.WillyouhelpmeifI_____(need)you.7.Theywillgetwetifit____(rain).8.Wewillanswerifwe___(can).9.Ifyoueattoomuch,you______(get)ill.()10.---WhatwillBilldoifhe____inthetest?---Hewilltryagain.A.failB.fails.willfailD.isfailing()11.Pleasetellherthenewswhe
7、nshe_____.OK,Iwill.A.comesB.willcome.C.comeD.wouldcome()12.Thestudentswillplanttreesifit___tomorrow.A.didn’trainB.hasn’trainedC.won’trainD.doesn’train()13.We__homeifthereisnobus.---Oh,whatapity!A.willwalkB.havewalkedC.walkedD.walk()14.Ifit___
