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主将从现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。常见的有以下四种情况：一、条件状语从句的主句是一般将来时，那么从句常常用一般现在时如：WhenIgrowup,I’llbeanurseandlookafterpatients我长大后要当一名护士，照顾病人二、如果主句是祈使句，那么从句通常要用一般现在时如：Don’tlaughatmewhenImakeamistake.我犯错误的时候不要笑话我。三、如果主句是含有情态动词的一般现在时，根据需要从句多用一般现在时如：Youshouldbequietwhenyouareinthereadingroom在阅览室时应保持安静四.如果if的条件状语从句遇到变换间接和直接时,祈使句应用notto....如;Shesaidnottoclosethewindow常见的时间状语从句的连词有：assoonas,when,while,as,until等主将从现说的是在含有时间状语从句和条件状语从句的主从复合句中，如果主句的时态是一般将来时，那么从句要用一般现在时。例如：Iwilltellhimaboutitwhenhecomes.Ifitisfinetomorrow,wewillgoouting.如果主句的时态是过去将来时，那么从句要用一般过去时。例如：Hesaidthathewouldhaveanothertryifhehadthechance.Iknewhecouldhelpmeifhewasfreethenextday.任务设计任务I.请用正确的形式填空。1.IfIcome,I________(see)you.2.Ifitisfine,we______(go)forawalk.3.Ifitrained,they_________(stay)athome.4.Youwillspoilitifyou______(notbe)careful.5.Wewouldbeverymuchpleasedifyou_____(come).6.WillyouhelpmeifI_____(need)you.7.Theywillgetwetifit_____(rain).8.WhatapityIhaven’tgotmycar.IfIhad,I_________(take)youtotheairport.9.Wewouldanswerifwe_____(can).10.Ifyoueattoomuch,you______(get)ill.任务II.请根据给的线索将下列句子补充完整。A．eg.IfIwerepoor,Iwoulddomyshoppingincheaperstores.1.IfIweretrappedinalift,____________________________.2.IfIhadaflattireonmywayhome,_____________________.3.IfIheardanoiseoutsidemyapartmentinthemiddleofthenight,________________________________________________.4.Ifsomeonewasfollowingmedownadarkstreet,_________________.5.IfIwereshortoffiveyuanforatennisracket,__________________.6.IfIfoundawalletinthestreetwithalotofcashinit,__________.B.eg.IfIwononemilliondollarsinthelottery,I’dputitinthebankandwatchitgrow.1._____________________________,I’dleavemyhomecity.2.______________________________,Imightnotspeaktoyouagain.3._______________________________,I’dbeverymiserable.4._______________________________,I’dbefrightened.5._______________________________,I’dbeextremelyhappy.任务III.综合题：请根据上下文完成对话。1.A:Whatareyoudoingthisevening?B:I’mnotsure.Ifthere_____(notbe)anythinggoodonTV.IthinkI_______(read)adetectivestory.OrmaybeI______(go)tobedearly.2.A:WhattimewillKatebehome?B:IfI________(know)I________(tell)you.Butunfortunately,shedidn’tsayawordwithmebecausewearguedyesterday.A:Well,ifshe_____(get)homebefore10:00,pleaseaskhertocallme.3.A:I’msostressedout.B:It’snoneofmybusiness,butifI________(be)you,I_______(take)sometimeoff.4.A:I’mafraidyourflighthasbeendelayedduetobadweather.B:Ohno!Whenwillittakeoff?A:Wedon’thaveanyideayet.Ifit_________(stop)snowingthisevening,thenyourflight_____________(depart)sometimetonight.A:Whatarethechancesthatwillhappen?B:It’stooearlytotell.I________(let)youknowifI______(hear)anynews.参考答案及分析重点2任务I1.willsee,2.willgo3.wouldstay4.arenot5.came6.need7.rains8.wouldtake9.could10.willget任务II.A.Iwouldcallupthepolice.2.Iwouldruntotherepairingstation.3.Iwouldn’tsleepatall.4.Iwouldrunthefastest.5.Iwouldborrowitfrommyparents.6.Iwouldgiveittothepolice.B.1.IfIdidsomethingwrong2.Ifyousaidsomethingbadaboutme3.IfIhadlittlepocketmoney4.IfIheardastrangenoiseatnight5.IfIgotgoodgradesinthemid-termtest,任务III.1．isn’t,willread,willgo2.knew,would,gets3.were,wouldtake4.stopped,would,depart,willlet,hear