Rewrite the sentences with must and mustn't. 1) Don't swim alone in the lake. 2) Bring trainers with you. 3) Don't make phone calls after 10 pm. 4) Wake up early.

1) You mustn`t swim alone in the lake.

2) You must bring trainers with you.

3) You mustn`t make phone calls after 10 pm.

4) You must wake up early.