1. above/ over/ on

这三个介词都表示“在……之上”，但含义不同。on指在某物的表面上，和某物接触；above指在某物的上方，不和某物接触，但也不一定在某物的正上方；over指在某物的正上方，不和某物接触。试比较：

There is a book on the desk.课桌上有一本书。

I raise my right hand above my head. 我把右手高举过头。

There is a stone bridge over the river. 河面上有座石桥。

7. 时间状语从句和条件状语从句。

[名师讲解]

6. 情态动词can, may和must, have to的用法；

5. 简单句的五种基本句型；

4. 感叹句；

3. 一般将来时；

2. 反意疑问句的用法；

1. 一般过去时；

40.What's the trouble? 41.What's the matter with…? 42.She didn't feel like eating anything. 43.Nothing serious. 44.Have/get a pain in… 45.No problem. 46.Take this medicine three times a day.

IV. 重要语法

31.You must be more careful! 32.You mustn't cross the road now. 33.If you want to cross a street, you must wait for the green light. 34.Please stand in line. 35.You must wait for your turn. 36.If you don't go soon, you'll be late. 37.I don't feel very well. 38.My head hurts. 39.You mustn't eat anything until you see the doctor.