1. Students haven't to eat in the lecture halls:it's not allowed.
2. It's raining out. You should take an umbrella.
3. Why didn't she tell us about her problems? We could help her.
4. Nick must take the bus because his cousin offered to give him a lift.
5. Soldiers should obey without question.
6. He has to work in library now. I've just seen him.
7. You shouldn't cone here to tell me. You could call me instead.
8. I had no key, I waked my mother and she let me in.
9. I'm so tired, I really going to bed now.
10. Despide playing under strength, the team was beat their reveals.

1 Students mustn't eat in the lecture halls:it's not allowed.
2 It's raining out. You should take an umbrella.
3 Why didn't she tell us about her problems? We could help her.
4 Nick didn't need (didn't have to) to take the bus because his cousin offered to give him a lift.
5 Soldiers must obey without question.
6 He must be working in library now. I've just seen him.
7 You needn't have come here to tell me. You could call me instead.
8 I had no key, I had to wake my mother and she let me in.
9 I'm so tired, I really should/need to go to bed now.
10 Despite playing under strength, the team could beat their riveals.