Unit 12Section A Grammar focus—Section B 1e课件2021-2022学年人教版英语九年级全册

Grammar Focus—Section B 1e Unit 12 Life is full of the unexpected. 第3课时 Task 1 Did you forget to bring your backpack to school? Did you miss the bus? What made you embarrassed? Warming-up Free talk When I got to school, I realized that I had left my backpack at home. By the time I got back to school, the bell had rung. Before I got to the bus stop, the bus had already left. 总结：由when, by the time, before等引导时间状语从句时，若描述发生在过去的事，主句常用过去完成时(had + 过去分词)表示动作发生在过去的过去。 Presentation Let’s find Ask Ss to read the sentences and summarize the usage of the past perfect tense. I was about to go up to my office when I decided to get a coffee first. As I was waiting in line with the other office workers, I heard a loud sound. 总结：be about to do, be doing 等表示即将或正在做某事时，常用when/as引导的从句表示突然发生的动作。 Presentation Ask Ss to read the sentences and summarize the usage of the past perfect tense. The Past Perfect Tense 过去完成时 过去完成时的构成： 助动词 had (用于各种人称和数) + 过去分词 过去完成时的