过去完成时语法精讲 一、过去完成时的概念与结构特点概念: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,即“过去的过去( past-in-the-past )”。-|- |-|-那时以前 那时 现在构成: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。They had already had breakfast before they arrived at the hotel.She had finished writing the composition by 10 :00 this morning.二、过去完成时的判断依据1. 由时间状语来判定一般说来,各种时态都有特定的时间状语。与过去完成时连用的时间