1、Unit 12 Life is full of the unexpected. Section A （ Grammar Focus 4c ） 一、教学目标： 1. 语言知识目标： 1) 学习掌握下列词汇： cream, workday, pie, show up, bean, market, by the end of 2）进行一步复习巩固学习 Section A 部分所学的生词和词组。 3）巩固过去完成时的用法 2. 情感态度价值观目标： 1）能运用所掌握的语法，句型和词汇进行交流。 2）能比较流利地讲述自己曾经有的特别的经历。 二、教学重难点 1. 教学重点： 1) 复习巩固 Sectio
2、n A 部分所学的生词和词组，达到熟练运用的目标。 2) 总结过去完成时的不同句型。 3）总结过去完成时的用法。 2. 教学难点： 过去完成时的用法 What a bad morning! What about your morning? First, I had overslept when the clock went off. Then by the time I made the banana pie, I had hurt my finger with a knife. Before I went to school, I had bandaged my finger up. By
3、the time she got up, her brother had already gotten in the shower. By the time she went outside, the bus had already left. When she got to school, she realized she had left her backpack at home. What happened to Mary? 1.构成： 主 +_+_ had V过去分词 2.过去完成时常与 _等引导的时间状语连用。 when, by the time , before, by 过去完成时
4、 表示在过去某个时间或动作之前已经发生或完成了的动作或存在的状态，即“过去的过去（ past-in-the-past ）”。 7 oclock 8 oclock now the bus had left went outside had left at home got to school By the time she went outside, the bus had already left. When she got to school, she realized she had left her backpack at home. past past in past 一般过去时 表示
5、在 过去 某时发生的动作或存在的状态。 例： We started to learn English 5 years ago. 我们五年前开始学英语。 对比 一般过去时与过去完成时 5 years ago now past now 1）在以上的时间状语从句中，主句和从句的动作是同时发生，或者是在进行一个动作时，另外一个动作突然发生。 2）主从句都用一般过去时态的时间状语从句引导词有（ when , as ）等 ? When he came in, the students stood up. ? When the baby saw her mother, she stopped crying.
6、 ? He was about to watch a movie when his parents knocked at the door. ? They were about to get on the bus when they heard someone shout. ? As I was standing in front of the teachers office, I saw a boy fight with another boy. ? As he was doing housework, a bird flew into the kitchen. 思考与讨论： 1. 在以下的
7、时间状语从句中，主句和从句的动作是先后发生还 是同时发生？ 2. 主从句都用一般过去时态的时间状语从句的引导词有什么？ past past in past now the bus had left went outside past now 5 years ago now 过去完成时 表示在过去某个时间或动作之前已经发生或完成了的动作或存在的状态，即“过去的过去（ past-in-the-past ）”。 一般过去时 表示在 过去 某时发生的动作或存在的状态。 一般过去时与过去完成时 Grammar Focus When I went to school, I realized that I
8、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. 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. 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。
