初二英语4Unit 2 Keeping Health1 教案

Unit 2 Keeping Healthy

Topic 2 I must have a good rest tonight.

Section B

学习目标：

1. 学习情态动词must及其否定形式must not表示必要的性用法。

2. 继续谈论如何养成良好习惯，保持健康。

重点词汇及短语：

1. ask sb. (not to do sth.

2. must (not do sth.

3. cause cancer 致癌

4. give up smoking 戒烟

5. walk on the lawn 践踏草坪

6. read in the sun 在阳光下看书

7. put the litter into the dustbin 把垃圾放进垃圾箱里

8. be necessary for… 对……来说是必要的

9. during the day = in the daytime 白天

10. enough sleep 足够的睡眠

重点句型：

1. Smoking is bad for his health.

2. How terrible!

3. It may cause cancer.

4. I must ask him to give up smoking.

5. May I borrow your newspaper and show it to my father?

6. You mustn’t throw litter around.

7. Don’t stay up late at night.

8. Breakfast gives you energy for the morning.

语法：情态动词 must

1、must + 动词原形，意为“应该，必须”。 eg:

We must keep ourselves healthy.

警句

三思而后行。

Think twice before you do.

2 、 must 的否定型式 must not 或mustn’t。 eg:

You must’t throw the litter on the floor.

3、由must引出的一般疑问句，简略答语是“Yes, sb. must.”或“No, sb. needn’t./don’t have to.”。 eg:

——Must I take the medicine？

——Yes, you must.

——No, you needn’t. / don’t have to.

课前预习：根据汉语提示完成句子。

1. Don’t （乱扔垃圾）. You should put it into the （垃圾箱）.

2. I must ask him to （放弃）the bad habit.

3. Don’t walk （在草坪上）.

4. Breakfast can give you （能量）for the whole day.

5. You shouldn’t （在阳光下读书）.

6. There is an interesting （文章）about education.

7. It’s （必要的）for us to get up early.

8. Doctors found a （癌）on her breast.

课堂练习：

根据1a回答问题。

(1 Why does Maria’s father smoke?

(2 What may smoking cause?

(3What do you think Maria’s father should do?

根据2a回答问题。

(1Is going to school without breakfast good or bad for your health? (2Must we drink enough water every day?

句型转化。

1.

欲速则不达。

More haste, less speed.

警句

Don’t run in the street.

You in the street.

2. smoking may cause cancer. （对划线部分提问）

cancer?

3. You must read in the sun. （改为否定句）

You read in the sun.

拓展练习：

用方框所给词的适当形式填空。

cause, enough, throw, act, keep, relax,

necessary, during, energry, health

1. Walking can help yourself.

2. Eating fruit keeps us .

3. Walking is for good health.

4. Breakfast gives us for the morning.

5. long fingernails is a bad habit.

6. the day we can see the sun.

7. Going to bed early and getting up early will keep us in the daytime.

8. You mustn’t litter around.

9. He is very poor, so he has no food to eat.

10.——What may the bird flu（禽流感）? Do you know? ——Sorry, I don’t know.

用must和mustn’t填空。

1. The traffic stop when the lights are red.

2. Children play in the street.