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Teaching aid: PPT
Teaching procedures:
Step 1. Warming up
1.Free talk: How are you? What a good day！
2. 复习颜色单词，运用句型描述自己以前喜欢的颜色和现在喜欢的颜色
Before, I like... Now, I didn’t like... I like...
Step 2. Presentation
出示图片操练句式Before, I ... Now, I ...
教学词语：quiet, active, different, change
听录音，跟读课文。
自读课文，回答问题。
How did John change?
How did Mike change?
再听录音， 跟读课文。
学生分组读课文。
Step 3. Practice
Role-play
Group work: How did you change?
Step 4. Homework
How did your friends and your family members change?talk about it with your classmates.