Make some questions and answers as to the traffic light(s) наприклад: -can i cross the road when the light is red? -no,you mustn*t .you should cross it when the light is green. must may could

- Must we clean our room every day?
- No we mustn't. We must clean our room once a week.

- Could you help me?
- No you couldn't help her. You should turn to someone else.