来源:网络资源 2023-02-18 19:19:55
过去完成时的结构特点
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 )”。
过去完成时过去时现在进行时
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.
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