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1、-辨析be to do,be going to do,和be about to do的区别-第 3 页1）betodo:(1)表示事先商定、安排或准备要做的事情。如：Thestudentsaretomeetattheschoolgatetomorrow.明天学生们将在学校大门口集会。2）表示可能性，必要、责任、义务、禁止等。如：Hernecklacewasnotto(couldnt)befound.她的项链找不到了。2)begoingtodo:1)表示将要发生的事情或打算最近要进行的动作。如：Itisgoingtorainsoon.快要下雨了。2)在含有条件状语从句的主从复合句中，主句一般不用
2、begoingto，而常用will（第一人称用shall）。如：Thefootballmatchwillbeputoffifitrainstomorrow.如果明天下雨，足球赛将被推迟举行。3)beabouttodo:1)表示即将发生的动作，在时间上指最近的将来。如：Weareabouttostart.我们就要出发了。Thenewschoolyearisabouttobegin.新学年开学在即。2)在含有beabouttodo的句子中，不能再加时间状语。如：Wrong:Themedicalteamisabouttostartimmediately.Right:Themedicalteamisa
3、bouttostart.医疗队就要出发了。附：betodo用法的详细讲解：beto+动词不定式中的beto用作情态习语,这时的betodo表示:“计划”、“安排”、“义务”、“应该”、“可能”、“命运”等。(haveto,oughtto)。如:Heistohaveaholiday.(表示将来)Thecommitteeistomeettoday.(表示计划、安排)Youaretogotothehotelwhereroomshavealreadybeenbookedforyou.1.表示“将”、“计划”、“安排”。(意思接近于begoingto)如：Theirdaughteristogetmarr
4、iedsoon.Itwasthelastfilmatthecinema，whichwastoclosenextday.was/weretodo表示过去曾经计划要做的事，或者过去应当做的事，而且从现在的角度来看已经实现了。如：IfeltnervousbecauseIwassoontoleavehomeforthefirsttime.Theexpeditionwastostartinaweekstime.was/weretohavedone,表示“本打算”、“本计划”或“本应当”做的事而没有做成或没有发生。如:IwastohaveseenhimlastWednesday,buthedidntcom
5、e.Weweretohavebeenmarriedlastyear.2.表示“义务”、“应该”。(意思接近于should，must，oughtto，haveto)如：Nooneistoleavethebuilding.谁也不得离开这楼房。Youarenottosmokeinthisroom.=Youarenotsupposedtosmokeinthisroom.Youaretobebackby10oclock.你必须十点以前回来。4.表示“命运”,将来必然要发生的事,译作“注定”。如：Hecametopower,buthewastoplaydearlyforit:soonhewasassass
6、inated.Theysaidgoodbye,littleknowingtheywerenevertomeetagain.Exercises:1.Thisfilm_thisSunday.A.isgoingtoshowB.isshowingC.istobeshowD.willhavebeenshow2.Thestudentsweretoldthatthey_attheschoolgateat2:00thefollowingafternoon.A.metB.willmeetC.weretomeetD.weremet3.Thehouse_readytodaybutastherehasbeenabui
7、ldersstrikeitisstillonlyhalffinished.A.isB.wastobeC.wasD.wastohavebeen4.Insuchdryweather,theflowerswillhavetobewateredifthey_.A.havesurvivedB.aretosurviveC.wouldsurviveD.willsurvive5.How_I_whathasbecomeofhim?A.am;toknowB.am;knowingC.was;toknowD.will;know6._he_tomorrow,Iwouldgotomeethimatthestation.A.Were;tocomeB.Was;comingC.Did;comeD.Would;come