一、Pre-class
1. Greeting
2. Leading-in
教师活动：展示一些将情态动词挖空处理的句子，让学生完成练习，体会情态动词的特征。
1. "What shall I read？"You have asked yourself this question more than once.
2. If you are not sure what to read, you get ideas from different sources , but it is also important to develop your own taste.
3. To start with, ask your friends, parents and teachers to recommend what books you read.
4. However, you also decide for yourself what kind of books to read.
答案：1.might; 2.can; 3.ought to/should; 4.must
