4. emphasize the correct use of the modal verb 1) You must/should/shouldn't be 18 before you can drive in Spain. 2) You don't have to/mustn't/ shouldn't go to bed so late. It's not good for you. 3) You don't have to/mustn't shouldn't wear a school uniform in most Spanish state schools. 4) You must / mustn't/needn't come. I can do it without you. 5) You don't have to /must / mustn't copy during exams. 6) You don't have to /mustn't shouldn't be very tall to play football. 7) You must /mustn't needn't be a good writer to win the Pulitzer Prize.