初一英语时态知识点：过去完成时的构成

初一英语时态:过去完成时的构成 卓越教育老师为大家整理了初中的众多知识点归纳、考点总结、以及复习资料，供各位学生和家长参考。希望大家能从中得到收获，下面是：　　过去完成时　　The Past Perfect Tense　　一、过去完成时的构成　　过去完成时由'助动词had (通用于各种人称和数)＋过去分词'构成。主要表示过去某时前已发生的动作或情况（也可说是'过去的过去'）：　　By the time I got there, it had already finished.　　When I got to the check-out, I realized I had left my purse at home.　　He said he had never seen such an exciting match before.　　注：如果时间状语从句的动作发生在前，则从句用过去完成时，主句用一般过去时。　　When he had finished his work , he left his office .　　After I had done my homework , I went to bed.　　 二、陈述句　　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。　　She had searched the internet for two hours when she found an ad for the Canon digital camera. 当她找到了佳能数码照相机的广告时，她已经在因特网上查询了两个小时。　　I went over what I had written again and again so that I wouldn't make any mistakes. 我一遍又一遍地检查了我所写的内容，以至我没有出现任何错误。　　 三、否定句　　He remembered he hadn't paid for it yet. 他记得他还没有付账。　　He said that he had never seen such a beautiful bird before.　　他说他以前从来没有看过这样美丽的鸟。　　疑问句　　How many English films had you seen by the end of last term?　　到上学期期末为止，你们看了多少部英文片？　　Had you reached the station before ten o'clock?　　十点以前，你们已经到达火车站了吗？