高中英语 Past Perfect Continuous课件 北师大版选修6

PastPerfectContinuous1临邑二中陈WhatisPastPerfectContinuous?1.Thisafternoon,Iwasinthetowncenter,whereIhadbeendoingsomeshopping.2.Oneafternoon,hundredsofunluckypassengerswhohadbeenexpectingtoboardaflighttoNewYorkweretoldithadbeencancelled.2临邑二中陈summaryhadbeendoing意义：Beforeshewasrescuedfromtheruins,thesoldiershadbeensearchingfortwohours.Ihadbeenwaitingfortwohourswhentheyannouncedthattheti...