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1、A conclusion of Past Perfect Tense过去完成时态总结一、含义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。动作发生的时间是过去之过去。二、构成助动词had+动词的过去分词。He had run off before the earthquake. .He finished his homeworkI went to see his mother nowHe had finished his homework before I went to see his mother过去完成时态的否定形式和一般疑问形式：had是助动词，所以直接在had后面加not或者
2、 是将had提前He had finished his homework before I went to see his mother.He had not finished his homework before I went to see his mother.Had he finished his homework before I went to see his mother ?Yes, he had./ No, he hadnt.hadntBy the time my mom came back , I had had breakfast.My mom came backnow8:
3、156:00pmI had breakfastHe ran out of money to buy old bikes.He told a reporter about itnowHe told a reporter that he had run out of money to buy old bikes.I met XiaomingYou talked to himNow Before you talked to Xiaoming, I had met him.I learned more than 1000 wordsThe end of 1998nowBy the end of 199
4、8, I had learned more than 1000 words.Translation1.我到家时她已经睡了。By the time I got home, she had already gone to bed.2.我没有去，因为我已看过这部电影。I didnt go because I had already seen the film.3.他走以后我找到了那封信。I found the letter after he had gone away.We reached the cinema late. The film had already begun.4.我们到电影院晚了,电影已经开始了。5.我们发现有人把我们的窗户打破了。We found that somebody had broken our window.I soon realized that I had made a serious mistake.6.不久我意识到自己犯了一个严重的错误。
