概念: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,即“过去的过去( past-in-the-past )”。本~地~生~活~网
构成:“助动词 had + 过去分词”,其中 had 通用于各种人称。欢迎www.bdsh5.com
They had already had breakfast before they arrived at the hotel.在到达旅馆之前,他们已经吃过了早饭。b~d~s~h~5~c~o~m
She had finished writing the composition by 10:00 this morning. 今天早晨10点之前,她已经写完了作文。原文www.bdsh5.com本+地+生+活+网