PastSimplevsPastPerfect一般过去时和过去完成时专家讲座.pptVIP

Pastsimplevs.pastperfectsimplePastSimplevsPastPerfect一般过去时和过去完成时专家讲座第1页

1.cleanedtheblackboard2.closedthewindow——————∣—————∣—————→∣——→nowhadcleanedtheblackboardclosedthewindowShehadcleanedtheblackboardbeforesheclosedthewindow.Aftershehadcleanedtheblackboard,sheclosedthewindow.PastSimplevsPastPerfect一般过去时和过去完成时专家讲座第2页

drankwaterhadrunoutofbreath1.ranoutofbreath2.drankwaterHehadrunoutofbreathbeforehedrankwater.Afterhehadrunoutofbreath,hedrankwater.——————∣—————∣—————→∣——→nowPastSimplevsPastPerfect一般过去时和过去完成时专家讲座第3页

1.ateanapple2.slept——————∣—————∣—————→∣——→nowhadeatenanapplesleptShehadeatenanapplebeforesheslept.Aftershehadeatenanapple,sheslept.PastSimplevsPastPerfect一般过去时和过去完成时专家讲座第4页

2.playedpingpong1.didhishomework——————∣—————∣—————→∣——→nowplayedpingponghaddonehishomeworkHehaddonehishomeworkbeforeheplayedpingpong.Afterhehaddonehishomework,heplayedPingpong.PastSimplevsPastPerfect一般过去时和过去完成时专家讲座第5页

Discussion:ThestructureofthePastperfecttense:（结构）2.ThedefinitionofthePastperfecttense:（定义）PastSimplevsPastPerfect一般过去时和过去完成时专家讲座第6页

主语+had+动词过去分词(p.p.)定义:过去完成时:强调过去某一个动作发生在另一个动作前常惯用过去完成时态。1.在老师进入教室前,李磊擦了黑板.LiLei______________(clean)theblackboardbeforetheteachercameintotheclassroom.hadcleaned2.当我们到那儿时火车已经离开了。Thetrain__________(leave)whenwearrivedthere.hadleftWeusethepastperfectsimplewhenweneedtomakeitclearthataneventtookplacebeforeanotherpastevent.组成:PastSimplevsPastPerfect一般过去时和过去完成时专家讲座第7页

过去完成时判断依据:1.由时间状语来判定:普通说来，各种时态都有特定时间状语。与过去完成时连用时间状语有:(1)by+过去时间点。如:昨天晚上九点前我已经读完这本小说了。Ihadfinishedreadingthenovelbynineoclocklastnight.PastSimplevsPastPerfect一般过去时和过去完成时专家讲座第8页

(2)bytheendof+过去时间点。如:截止到上学期末，我们已经学了两千多个英文单词了。WehadlearnedovertwothousandEnglishwordsbytheendoflastterm.(3)before