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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”。定义：构成：had＋过去分词常用的时间状语等标志词：1、by,before,when,bythetime等构成的短语或引导的从句。Eg.1)Bythetimeshecametothebusstop,thebushadalreadygone.2)Wehadfinishedthetaskbeforelastmidnight3)WhenIarrivedatthepostoffice,IfoundthatIhadlefttheletterathome4)AfterIhadfinishedmyhomework,Iwenttobed.3、从过去开始，一直持续到过去的另一时间的动作、状态。常用since，for.Eg.ShesaidthatshehadlearnedEnglishforyearssincehecametoourschool注意：瞬间动词不能和一段时间状语，及since,for引导的从句和短语连用。2、由said,told,knew,heard,thought等引导的宾语从句中。Eg.Hetoldmethathehadheardofit.Ithoughtmyhomeworkhadbeenfininshed.ButIdidn’t.6:007:00现在BythetimeIgotup,mysisterhadalreadywashedalltheclothes.1.我到家时她已经睡了。BythetimeIgothome,shehadalreadygonetobed.2.到昨天晚上时消息已传遍全球。Byyesterdayeveningthenewshadspreadthroughtheworld.3.他走以后我找到了那封信。Ifoundtheletterafterhehadgoneaway.Wereachedthecinemalate.Thefilmhadalreadybeenonfortenminutes.4.我们到电影院晚了,电影已经开始十分钟了。现在完成时和过去完成时的区别：ThedifferencesbetweenPresentPerfecttenseandPastPerfecttense.(1)ShehastaughtEnglishfor6years.(2)“WhereisSusan”“ShehasgonetoAmerica”.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)BythetimeIgottoLondon,shehadgonetoAmerica.表示过去某时之前发生的动作。现在完成时:主语+have/hasdone过去完成时:主语+haddone过去的过去过去现在nowpast现在完成时过去完成时timetime分析：答案选D。因为上大学是过去，学了五千个英语单词是在上大学之前，即“过去的过去”，所以用过去完成时。He_____morethan5,000Englishwordswhenheenteredtheuniversityattheageof15.(2005北京卷)A.haslearnedB.wouldhavelearnedB.C.learnedD.hadlearnedCanyoudoit?1.Byyesterdaymorning,he________(call)metentimes.2.Thepatient___________(die)whenthedoctorarrived.3.IsawLinFengyesterday.We___________(notmeet)eachotherforfiveyears.hadcalledhaddiedhadnotmet4.IreturnedthebookthatI___________(borrow).5.Hesaidthathe___________(know)herwell.6.Thematch________(be)onforhalfanhour.7.Thematch_______(be)onforhalfanhourwhenIgotthere.8.They____(do)theworkat11o’clockyesterdaymorning.hadborrowedhadknownhasbeenhadbeendid9.They________(do)theworkby11o’clockyesterdaymorning.10.Thepopsingers___________(leave)whenIgottothemusichalllastnight.Whatapity!11.Howcleantheroomistoday!Oh,yes!Who_________(clean)it?haddonehadleftcleaned12.WhatwereyoudoingwhenJimphonedyou?I__________(finish)myhomeworkandwasstartingtotakeashower.13.HaveyoueverbeentoGuilin?Yes.I_________(go)therefourmonthsago.hadfinishedwent