二.重点句型

1.Don’t arrive late for school=Don’t be late for school

2.Don’t fight =

3.Don’t listen to music in the classroom.

4.Don’t run in the hallways

5.Don’t smoke .It’s bad for your health.

6.Don’t play cards in school

7.Don’t talk in class

8.Don’t watch TV on school nights.

9.Don’t sleep in class.

10.Don’t play sports in the classrooms.

11.Don’t sing songs at night.

12.Don’t talk when you eat.

13.Don’t wear hats in class.

14.Do homework by 10:00.

15.Clean your house!

16.Make the bed.

17.Can we ……? Yes ,we can . No, we can’t.

Eg: Can we arrive late for class ? No, we can’t. We can’t arrive late for class.

18.Do you have to wash your clothes? Yes, I do./No, I don’t.

三. 重难点解析：

1. 情态动词have to 的用法，意思是"必须、不得不"，它侧重于客观上的必要和外界的权威。(1)结构：主语+have to+动词原形+其他

(一般现在时，主语是第三人称单数时，用has to;句子是过去时，用had to.)如：　　　　　　　　　　We have to wear sneakers for gym class. 在体育课上，我们必须穿运动鞋。Tom has to practice the guitar every day. 汤姆每天必须练习弹吉它。I had to get up at 5:00 am last Monday. 上周一，我不得不早上5点起床。

(2)否定形式：主语+don't have to+动词原形+其他

(一般现在时，主语是第三人称单数时，用doesn't have to. 句子是过去时，用didn't have to)

如：Nick doesn't have to wear a uniform. 尼克不必穿制服。We didn't have to do our homework at once. 我们不必马上完成作业。

(3)疑问句：Do (Does或Did)+主语+have to +动词原形+其他

如：Do you have to stay at home on weekends? 周末你必须呆在家里吗?Yes, I do. / No, I don't.

是的，我必须。不，我不必。Did he have to go to bed by 11:00 last night? 昨晚，他不得不11点前上床睡觉吗?

2. 情态动词can的用法

(1)表示能力，"会""能"(在第一册中已经学习这种用法)