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教学重点：能正确理解并朗读对话内容，在教师的引导和帮助下复述课文内容。
教学难点：could/could not …的正确理解和运用。
Teaching procedures 教学过程
Step 1 Warming up
1. T: Look! We know well each other, can you say sth about your techer.
2.呈现一张小时候照片 ，让学生说说小时候会做的事。
How about you? (引导学生用PPT上的句型来表达)
________ years ago, I could ________
Step 2 Presentation
1. 出现故事中的人物
2. 时间，人物配对。
3. 出示课题
T: Pay attention to these phrases. (PPT呈现Thirty years ago/Twenty years ago/Ten years ago，教师边指PPT边领读)
T: When we talk about the time before, we can use this word: then. What does it mean? (PPT只剩下then和now)
T: Yes, today we are going to learn a new lesson. The topic is Then and now. (点题)
(读题目，学生用自己的理解去翻译题目)
【设计意图：通过对时间状语的对比，让学生理解两个时态的差别，并引出本课的主题】
Step 3 Story time
Part 1
1. T: Many changes have happened to Mike’s family. What are they? (播放动画)
T: Can you say something about Mike’s family? (PPT呈现句型)
例：Six years ago, Mike was short. Now he is tall.
2. T: They have changed a lot. And in this lesson, we’ll know more about the changes of Mike’s family.
3. T: This boy is Mike. Now, he is a young boy. And he can do many things now. Let’s guess, what can he do?
T: Could Mike do all these things six years ago? What could he do? Can you guess? What couldn’t he do?
T: So, six years ago, Mike could read and draw but he couldn’t write. (师生一起读文本)
T: Can you describe little Mike six years ago and young Mike now?
4. (1) Listen and tick (学生们选出听到的单词，整体感知课文)
(2) Check and read (教师核对答案并领读单词)
5. T: What did they do then and what do they do now? Read the text quickly, and try to find out the answer. (PPT呈现)