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1、Unit10BythetimeIgotoutside,thebushadalreadyleft.PeriodOneGrammarFocusThePastPerfectTense过去完成时GrammarFocus(P77)2.过去完成时可以表示过去某一时刻或某一动作之前完成的动作或呈现的状态。也就是说发生在“过去的过去”1.过去完成时构成：had＋过去分词BythetimeIgottoschool,thebellhadrung.=when当…的时候Igottoschool.now8:007:30amThebellrang.当我到学校时，上课铃已经响了My
2、momcameback.now9:00am8:00amIcleaneduptheyard.Bythetimemymomcameback,Ihadcleaneduptheyard.8:00am9:00amnowBythetimeshewentoutside,thebushadleft.Shewentoutside.Thebusleft.thepolicemangettotheshop.Tomrunaway.Bythetimethepolicemangottotheshop,Tomhadrunaway.now5:00pm6:00pmBythetimeLiu
3、Meiwokeup,theconcerthadbeenover.now8:00pm8:15pmTheconcertwasover.LiuMeiwokeup.Bythetimehisgrandmotherdied,LiMinghadgrownup.200820062007LiMinggrewup.Hisgrandmotherdied.6:007:00现在BythetimeIgotup,mysisterhadalreadywashedalltheclothes.Bythetime……到….的时候BythetimeIgothome,……BythetimeIc
4、amein,……BythetimeIgottoschool,……Bythetimethebellrang,……BythetimeIgotup,……完成下列句子过去完成时的用法：1、表示过去的过去，通常由when，by或before引导的短语或者从句(要用一般过去时)做时间状语①Bytheendoflastyear,IhadlearnedaboutonethousandEnglishwords.②Bythetimehewastwenty,hehadwonabouttenmedals.③WhenIgotthere,theyhadalreadyleft.④W
5、ehadfinishedourlunchbeforehecame.2、常用在宾语从句中①Hetoldmehehadalreadyfinishedhishomework.②Irealizedhehadfooledmeagain.现在完成时与过去完成时的区别1.ShehastaughtEnglishfor6 years.2.ShehaslivedinAmericasince 2002.表示过去某时发生的动作，这动作可能刚刚停止,也可能还在进行。1.ShesaidshehadtaughtEnglishfor6years.2.BythetimeIgottoLo
6、ndon,shehadgonetoAmerica.表示过去某时之前发生的动作,现在已经停止。Ihavebeenatschoolsince8:00am.Iwasatschool.now7:30am7:00amThebellisringing.现在完成时过去完成时now 9:00am7:30am8:00amThebellrang.Igottoschool.BythetimeIgottoschool,thebellhadrung.1.We________(learn)twothousandswordsbytheendoflastyear.Canyoudoit
7、?3.Whenwe_______(arrive)atthestation,they__________(wait)formorethantwentyminutes.hadlearnedarrivedhadwaited2.I___________(know)himwhenIwasastudent.hadknown4.Oneofthemencouldn'tmove,becausehe__________(break)hislegs.hadbroken5.Fathertoldmethathe__________(write)anewbook.6.Mother
8、_______(have)breakfastbeforeseveno’clockthatmor
