1. Unit7 Protect the earth 第三课时

2. Read the story. Retell it.

3. How to save water? We should not waste water.
We should reuse and save it.

5. How to save energy?
We should not drive so much because cars use a lot of energy.

7. How to save trees?
We should not cut down too many trees because trees help the air clean.

9. How to use plastic?
We should not use too many plastic bags or bottles.
We should use paper bags and glass bottles.

11. Let’s read these sentences.

12. We use water to clean things.
We use plastic to make bags and bottles.
We use wood to make tables, chairs and other things.

13. make tables, chairs and other things.We
use
water to
clean things.
plastic
make bags and bottles.
wood
make tables, chairs and other things.
动词短语原形
人称代词 I
They You He She Mike
名词coal
oil, paper computer
pen ,crayon

14. should 应该
should not=shouldn’t
不应该

15. Brain storm:
Make more sentences with:
Should
Should not

16. 情态动词+动词原形
can, could, would , should, shall…

17. 一、用合适的情态动词填空.
1、  ________ you like some juice?
2、They ________ take more exercise. 3、 ________ you tell me the way to the museum? 4、The watch ________ tell us the right time. 5、 ________ you like to go boating with us? 6、________ we play chess next weekend?

18. 按要求完成句子
1、  She can walk quickly. I ________ ________quickly . (否定句)
2、 They can paint the wall well. （一般疑问句） _______ they ______ the wall well? 3、She should reach the station early.   (否定句) She _______ _______ reach the station early.
4、We use water to clean things.(一般疑问句)

19. 5、We use plastic to make bags and bottles.（否）
6、We use wood to make tables, chairs and other things.（划）
7、I’d like to have some drinks.（一般疑问句）
8、翻译：我们使用铅笔写字。
9、翻译：我应该每天早起，并努力学习。

20. Fun time

21. How to reuse?

22. reuse…to…
I can reuse … to make…