有分析和练习题
一、过去完成时态构成:助动词had(通用于各种人称和数)+过去分词
二、过去完成时的用法: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。它表示动作发生在过去的过去。与by、before等构成的短语连用。
三、过去完成时的句式
1.陈述句(Statements )
They had already had breakfast before they arrived at the hotel.
在他们到达旅馆之前,他们已经吃早饭了。
从句中arrived at到达在过去的时间,而had already had吃早饭的动作发生在到达之前,因此主句的时态为过去的过去。
I had finished writing my composition by 10:00 this morning. 今天上午10:00点以前,我已经写完了我的作文。
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