2) I must remember to phone Sonia tonight.
3) Here's your present. You mustn't open it before your birthday!
4) I've told you before - you mustn't play football in the street.
5) You mustn't forget to lock the door before you leave,
6) If you go to London, you must go to the Trocadero - it's freat!
7) My old dictionary is useless - I must buy a new one.