Correcto: I must do my homework., You mustn’t be late for class., We must wear our school uniform., You must wash your hands before lunch., You must take a shower every day., You must eat fruit and vegetables every day., You must feed your dog every day., You must pay attention in class. , You mustn't be rude with your classmates. , You must drink water everyday. , Incorrecto: You must break the windows at school., You mustn't listen to your parents., You must forget to do your homework, You must eat lots of sweets, You must play football in the classroom., You must fight with your classmates., You must be rude to your grandparents., You must forget your best friend's birthday., You must stay in bed all day. , You must wear warm clothes when it is cold outside.,

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