Li Wei thirty now.

He working at school.

He Maths and Science,

and Art and Chinese too.

Step3.Presentation

1. 呈现话题内容：刚才我们了解了李伟的过去和现在，接下来我们谈论的两个人，在20年之间人生的角色发生转换，真是太巧了，让我们快来看一下吧。通过图片认识Mr Li 和Chen hai.

2. Watch the vedio,for the first time.

3. 分析课文，对比李先生和陈海

Mr Li Chen hai Twenty years ago A Chinese teacher

Taught Chinese

A good pupil

Studied very hard now Doesn't work

He's learning English. An English teacher

He's teaching Mr Li.