Must/mustn't

• You must listen to the teacher

• You mustn't listen to the teacher

• You must do your homework.

• You mustn't do your homework.

• You must run at school.

• You mustn't run at school.

• You must drink more water.

• You mustn't drink more water.

• You must drink a lot of juice.

• You mustn't drink too much juice.

• You must eat a lot of ice cream.

• You mustn't eat too much ice cream.

• You must eat in the classroom.

• You mustn't eat in the classroom.

• You must shout.

• You mustn't shout.

• You must be polite.

• You mustn't be polite.

• Yoy must speak quietly.

• You mustn't speak quietly.