查字典中考网整理了关于2020年中考英语知识点之过去完成时的概念及结构，希望对同学们有所帮助，仅供参考。
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 ）。
构成：助动词 had + 过去分词，其中 had 通用于各种人称。
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。
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。