Compléter Modals: ability or obligation1Version en ligne practice these modal verbs par Alvar Garcia Soriano 1 We wear a uniform at our school . ( mustn't / don't have to ) . Sarah cycle to school because there isn't a bus . ( has to / can ) . They leave by 6 pm or they'll miss the train . ( must / can ) . I read your writing . What does it say ? ( mustn't can't ) You walk in the park at night . It's dangerous . ( don't have to / mustn't ) Sally play the guitar very well . ( can / must )