Don't walk on the grass.

Don't shout in the zoo.

Don't climb the tree.

Let's go to school.

师提问：

1)Where are they？

2)What are they doing?

3)What do you want to say？

Listen and answer:指出禁止某人做某事时，用Don't ...

Task2: 争当文明小卫士

T: Amy, Sam, and Ms Smart are in the zoo. Are they feeling happy? Let's go and see what is happening.

（一）Watch and answer

1. Q: Can Amy and Sam shout in the zoo? Why?

2. Check the answers: No, they can't. Because the baby is sleeping.

（二）Listen and answer

1. Q1: Can Sam climb the tree? Why?

Q2: Can Amy walk on the grass?

1. Check the answers: No, he can't. Because it is dangerous.

No, she can't.

（三）生读活动二

1． 听、指、跟读。

2．自读、分角色读。

师总结否定祈使句的用法:Don't shout,piease!此句为否定祈使句，否定祈使句在句首加Don't,意为"不要"，它的

否定句的一般形式：Don't+动词原形+其他