(Przykład) You must be here by six. You mustn't be late.

1. You must go to bed. You mustn't stay up late.

2. You must be polite. You mustn't be rude.

3. You mustn't wear your jeans. You must wear smart clothes.

4. You must put your telephone on the silent mode. You mustn't disturb the people on the train.

5. You must take off your shoes. You mustn't make the carpet dirty.

6. You mustn't jump the queue. You must wait for your turn.