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课件网) Unit 12 Section A (2d&Grammar Focus-4c) Life is full of the unexpected. Learning Objectives 通过本课时学习，我们能够： 1 2 3 理清过去完成时的涵义、句式类型及基本用法，理解具体在哪些场景中需要应用过去完成时；能够认识其与一般过去时、现在完成时、过去完成时的区别。（学习理解） 归纳总结过去完成时的规则及用法，并应用其完成对应练习；能够在情境中综合应用多种时态，提升自己的表达能力，使得故事的描述更加生动。（应用实践） 写两句关于你昨天一天的真实陈述和一个虚假陈述，然后让你的同学猜出哪句是假的。（迁移创新） Mr. Zhen was dead. There are three criminal suspects(嫌疑人). Do you know who killed him Let’s find the murder together. three criminal suspects(嫌疑人) 7:10 7:00 a.m. Mr. He reaches his home. Mr. Zhen leaves home. 7:40 7:30 Mr. Zhen gets to the office. now Mr. Sa comes to his office. 8:50 8:55 Mr. Zhen gets to the cafe. Mr. Bai gets to the cafe. 7:10 7:00 a.m. Before I reached Mr. Zhen’s home, he had left. Mr. He reaches his home. Mr. Zhen leaves his home. now Mr. Zhen 先离开 leave --left --left 先发生 过去完成时 后发生 过去时 7:40 7:30 Mr. Zhen gets to the office. now Mr. Sa comes to his office. When I came to Mr. Zhen’s office, he had arrived(arrive) there. Mr. Zhen先到办公室 先发生 过去完成时 后发生 过去时 arrive -arrived -arrived 8.55 8.50 Mr. Bai gets to the café. now Mr. Zhen gets to café. By the time I arrived at the cafe, Mr. Zhen had got there. Mr.Bai was Lying. 先发生 过去完成时 后发生 过去时 get -got -got/gotten Mr. Zhen先到咖啡厅 Police found the coffee is poisonous(有毒的). Mr. Bai is the murder. Grammar Focus 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. 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. 过去完成时的构成：_____+_____ had 过去分词 过去完成时常与_____等引导的时间状语连用。 when, before, by the time 过去完成时 主句为过去完成时，从句是一般过去时，主句动作发生在从句之前。 两个动作同时进行，主从句都是一般过去时或过去进行时。 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. 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. Grammar Focus 过去完成时由“助动词had (用于各种人称和数) + 过去分词”构成 过去的过去 过去某时 现在 将来 过去完成时 从过去之前的某个时间点到过去的某个时间点为止 （先发生） （后发生） 1. 过去完成时的构成 2. 过去完成时的概念 过去完成时表示某动作或状态在过去某一时间或动作之前已经发生或完成，它表示动作发生的时间是“过去的过去”。 3. 过去完成时的句式类型 肯定句：主语＋had ＋过去分词＋… 否定句：主语＋ hadn’t ＋过去分词＋… 一般疑问句：Had ＋主语＋过去分词…？ (Yes, 主语＋had. / No, 主语＋ha ... ...
