1. I can run a hundred meters in twelve seconds.能够
2. There is no light in the house. They can’t be at home. 不可能
3. The garage is free. You may park your car here. 可以
4. I’m not sure. She may go to Italy or she may fly to Japan.也许
5. I’m sorry. I must go home now.必须（自愿）
6. My parents have to work from Monday to Friday. 不得不（被迫）
7. Lily isn’t at school today. She must be ill.一定
8. The apple is clean. You needn’t wash it again.不必
9. You mustn’t talk loudly in the library.不该
10. The woman is near-sighted. She has to wear glasses.不得不（被迫）
11. The man is very rich. He doesn’t need to work.不必
汉译英：
1、你能游过这条河吗？

2、他现在在美国。他不可能在中国。

3、你可以进来。

4、他也许在办公室里。

5、我们必须互相帮助。

6、学生们不得不穿校服（uniform）。

7、你一定是饿了。

8、你不必来看我。

9、你不该在睡觉前喝咖啡或茶。

10、他不得不早起。

11、你不必等。