精选优质文档-倾情为你奉上过去完成时态一、概念：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或呈现的状态，即“过去的过去（ past-in-the-past ）”。二、构成：过去完成时由“助动词 had + 过去分词”构成，其中 had 通用于各种人称。 e.g. They had already had breakfast before they arrived at the hotel. She had finished writing the composition by 10 ：00 this morning. 三、句式：它的否定句是在had后边加not，变一般疑问句是把had提前。 肯定答语：Yes, 主语+had 否定答语：No，主语+hadnte.g. I had reached the station before 9:00 oclock. I had not reached the station before 9:00 oclock. Had you reache
