1. Complete these sentences with must, mustn't or the correct form of have to.
1 At our school we must wear a uniform.
2 You mustn't cross the roads without looking. It's dangerous.
3 You don't have to turn on the central heating. It's automatic.
4 The exams are next week. I have to work harder.
5 You mustn't forget your umbrella. It's going to rain.
2. Complete the sentences with must, mustn't or needn't.
1 It's very warm outside. You needn't take a coat with you.
2 You mustn't speak with a full mouth, that's very impolite.
3 The doctor said I mustn't smoke so much.
4 In England you must drive on the left side of the road but in other European countries you mustn't.
5 Students mustn't be late for school.
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llevell
