高中语法——过去完成时课件（共19张PPT）

过去完成时 Grammar Focus 2. 表示过去某一时刻 或动作之前 已发生或完成的动作或呈现的状态。也就是说发生在“过去的过去”。 1. Past perfect Tense 过去完成时 构成：had＋过去分词 过去完成时态的用法： 1. 常由by或before, when引导的短语或从句做时间状语或时间状语从句 by 到……时候为止 by the end of last week 到上周末为止 by that time 到那时为止 before that year 那年之前 before I arrived 在我到达之前 ①By the end of last year, I had learned about one thousand English words. ②When I got there, they had already left. 2、常用在宾语从句中 ① He told me he had already finished his homework. ② I realized he had fooled me again 3、体现在上下文中 I didn’t go to the movies yesterday because I had seen it twice. 6:00 7:00 现在 By the time I got up, my sister had already washed all the clothes. By the time my mom came back home, I had cleaned up the yard. I got home My little brother went to bed By the time I got home, my little brother had gone to bed. now 9:00pm 8:00pm I got to school The teacher came into the classroom By the time I got to school, the teacher had come into t