Pour chaque phrase affirmative, choisir sa transformation en phrase négative. I must cut my hair. I mustn't cut my hair.I don't have to cut my hair. You must stay in your seat. You mustn't stay in your seat.You shouldn't stay in your seat. He must stop the noise. He mustn't stop the noise.He can't stop the noise. She must drive slow. She doesn't drive slow.She mustn't drive slow. We must help them. We don't have to help them.We mustn't help them. They must tell us something. They never tell us something.They mustn't tell us something.