时，铃已经响了。(3)But before I got to the bus stop,the bus had already left但是在我到车站之前，公共汽车已经离开了。（教材第90页）以上三个句子都含有一个相同的时态——过去完成时。语法点：过去完成时1．过去完成时的构成 过去完成时的谓语由“助动词had+过去分词”构成。否定式为“had not+过去分词”，had not缩写为hadn't。2．过去完成时的用法 (1)表示—个动作或状态在过去某一时间或动作之前已经完成，即发生在“过去的过去”。这个过去的时间可以用by，bef ore等介词短语或者—个时间状语从句来表示。 When I woke up，it had stopped raining. 我醒来时，雨已经停了。 (2)表示某一勃作或状态在过去某时之前已经开始，一直延续到这一过去的时间。用表延续的时间状语如by the end of+过去的时间点，by the time+从句等。 By the end of last year,she had worked in the factory for twenty years. 到去年年底，她已经在这家工厂工作20年了。【链接1】1. 【2013襄阳】—We all went to the cinema except you last night. Why didn't you come? —Because I _______ that movie twice.A. have watched B. had watched C. was watching D. would watch2. 【2010?兰州】The plane ______ when we got to the airport.A. had taken off B. was taken off C. will take off D. is taking offBA2．So Ijust quickly put on som |
