Unit3Lesson2exhibitionsandmuseum时间状语从句教学目标：Teachingobjectives:1.Studentswillbeabletomastertheadverbialclauseoftime.时间状语从句引导时间状语从句的词有when,while,as,before,after,until/till,assoonas,since时间状语从句的时态：when,after,before,until,assoonas引导的时间状语从句，如果主句是一般将来时、祈使句或含有将来的意味，从句用一般现在时代替一般将来时when“当……的时候”，引导的时间状语从句的动作和主句的动作可以是同时发生，也可以先后发生；从句可以用延续性动词，也可以用点动词。as“当……的时候”，强调主句与从句中的谓语动词动作同时发生，也可表示一个人的两个动作交替或同时进行，意为“一边……，一边……”，既可指时间点，也可指时间段；while“当……的时候”，也强调主句和从句的动作同时发生；但while只能表示一段时间，从句须用延续性动词。注：while也可以作并列连词，表转折的关系，相当于but，译为“然而”。eg.Ilikelisteningtomusic,whilemybrotherlikesdoingsports.till和until都表示“直到……为止”，主句用延续性动词，主句和从句都用肯定式；表示“直到……才”时，主句用终止性动词，主句用否定式，从句用肯定式。until较till正式，until引导的时间从句可以放在句首。since引导的时间状语从句常用一般过去时，其主句一般使用现在完成时。．注：常用句型：Itis+时间段+since从句译为：自从……有多长时间了。eg.Itissixyearssinceshegraduatedfromtheuniversity.before意为“在…之前”，引导时间状语从句时，表示主句的动作发生在从句的动作之前。after意为“在……之后”，引导时间状语从句时，表示主句的动作发生在从句的动作之后。assoonas意为“一……就……”，表示从句的动作一发生，主句的动作马上就发生。Exercise：1.Itwasquiet________thosebigtrucksstartedcomingthroughthetown.A.beforeB.afterC.untilD.unless2.Itseemedonlyseconds________theboyfinishedwashinghisface.A.whenB.beforeC.afterD.evenif3.Hardlyhadhereachedtheschoolgate________thebellrang.A.whileB.whenC.asD.assoonas6.Hewasabouttogotobed________thedoorbellrang.A.whileB.asC.beforeD.when7.________Ilistentoyouradvice,Igetintotrouble.A.EverytimeB.WhenC.WhileD.Until8._____JohnwaswatchingTV,hiswifewascooking.A.AsB.AssoonasC.WhileD.Till9.Thechildrenranawayfromtheorchard(果园)______theysawtheguard.A.themomentB.afterC.beforeD.as10.NosoonerhadIarrivedhome_____itbegantorain.A.whenB.whileC.asD.than11.Severalweekshadgoneby_____Irealizedthepaintingwasmissing.A.asB.beforeC.sinceD.whenIt__longbeforewe___theresultoftheexperiment.A.willnotbe;willknowB.is;willknowC.willnotbe;knowD.is;know–Whatwasthepartylike?--Wonderful.It’syears__Ienjoyedmyselfsomuch.A.afterB.beforeC.whenD.since14.Thenewsecretaryissupposedtoreporttothemanagerassoonasshe___A.willarriveB.arrivesC.isgoingtoarriveD.isarriving15._____gotintotheroom_____thetelephonerang.A.Hehardlyhad;thenB.Hardlyhadhe;whenC.Hehadnot;thenD.Nothadhe;when16.Nosoonerhadhefinishedhistalk_____hewassurroundedbytheworkers.A.asB.thenC.thanD.when17.–DidyouremembertogiveMarythemoneyyouowedher?--Yes,Igaveittoher_____Isawher.A.whileB.themomentC.suddenlyD.once18.Ithoughtherniceandhonest___Imether.A.firsttimeB.forthefirsttimeC.thefirsttimeD.bythefirsttime19.HewillhavelearnedEnglishforeightyearsbythetimehe_____fromtheuniversitynextyear.A.willgraduateB.willhavegraduatedC.graduatesD.istograduate20.Themomentthe28thOlympicGames_____open,thewholeworldcheered.A.declaredB.havebeendeclaredC.havedeclaredD.weredeclared21I___themessagetohimassoonashe___backtomorrow.Agive,comeB.willgive,willcomeC.willgive,comesD.give,willcome22.thedoctoradvisedmetolive____theairisfresh.AinwhereB.inwhichC.theplacewhereD.where23.TheRedCrossisexpectedtosendhelp_thereishumansuffering.AwhoeverB.howeverC.whateverD.wherever24.Ifyouaretraveling__thecustomsarereallyforeigntoyourown,pleasedoastheRomansdo.AinwhichB.whatC.whenD.where_
