1 We mustn't cross the road when the light is red
2 I have to phone my friend. I don't know home task
3 You should wacth this film. It's very interesting
4 He mustn't go out. He is ill
5 You'll have to go to the shop with me. I need your help
6 Children shouldn't watch TV late in the evening
7 You should wash your hands before dinner
8 I needn't buy new bicycle. My old one is very good
9 You shouldn't touch your dad's books. He will be angry
10 You shouldn't phone her late. She is busy now