1) Must they work in the park?
1) They mustn't work in the park.
2) Had I to take a bus yesterday?
2) I hadn't to take a bus yesterday.
3) Can she draw well?
3) She can't draw well.
4) Can we read and write English well?
4) We can't read and write English well.
5) Am I allowed to go out on cold days?
5) I am don't allowed to go out on cold days