Bonjour,
On complète le dialogue avec les auxiliaires can, can't, must et mustn't:
J’ai mis les auxiliaires à compléter en majuscule !
First, you MUST be very careful. You MUST pay attention to objects on the road and, of course, you MUSTN’T push other skaters.
Charlotte: And, CAN I wear my new cap?
Callum: No, you CAN’T but you CAN wear a helmet to protect your head.