1 She can speak English very well because she is from Australia.
2 We have to stay at home today , for It's raining outside.
3 May I go home right now? Yes, you may.
4 We should start early to get there on time.
5 You mustn't draw on the wall.
6 I can't finish the job all by myself.
7 We must obey the traffic rules.
8 Can you sing? No, I can't.
9 Must we wait here? No, you needn't.