摘要:(1) 构成:由助动词had + 过去分词 构成 否定式:had not + 过去分词 缩写形式:hadn’t (2) 用法 过去完成时表示在过去某一时间或动作之前已经发生或完成了的动作. (3) 它所表示的时间是“过去的过去 .①表示过去某一时间可用by, before 等构成的短语来表示②也可以用when, before, after 等引导的时间状语从句来表示 ③还可以通过宾语从句或通过上下文暗示.When I got there, you had already eaten you meal.当我到达那里时,你已经开始吃了.By the time he got here, the bus had left. 到他到达这里时.汽车已经离开了We had finished cleaning the room by ten testerday.Exx: 1) By the time the firemen arrived,the big fire (put)out. 2)He (go)to work after he a shower. 3)When I got to the theatre, the film 10 minutes.

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