Comlete the dialogues. Use the verds from the box.
can-can't-may-must-should
1) -Sir,... I come in?
-No,you mae not. You are late. You ... come to class earlier.
2) - Tom, ... you help your mother now ?
- Yes,dad. By the way, I always help her. I know that children ... help their parents.
3) -Jane,your grandad is ill. He is in hospital. You ... visit him. ... you do it today?
-No, mum, I ... I'll go there tomorrow.