My hobby

… please?
Mum: Hmm … that’s a nice idea, but first we must talk about the rules.
Jack: The rules? What must I do?
Mum: You mustn’t skate in the street.
Jack: OK. I must skate in the park.
Mum: That’s right, but in the roller skating area in the park, OK?

Oh, and you mustn’t wear your skates in the house. You must put them in the cupboard.
Jack: All right. So, can I have some skates, please, Mum?
Mum: OK, but you must remember they’re for your birthday, not for now.
Jack: Yes, of course, thanks, Mum.