3 речення з can,3 з may,3 з must

1) May I go out?
2) He may be at work.
3) You may call me tonight.

1) You cant do it!
2) Can I sit here?
3) If you have some free time, we can go for a walk.

1) I must go to doctor next week.
2) You mustnt leave without permission!
3) She isnt at school, so she must be ill.