You mustn’t be late.

You must keep the board clean.

You must be quiet.

You must listen to the teacher.

You must raise your hand before talking.

You mustn’t make noise.

You mustn’t fight.

You mustn’t run in the corridor.

You mustn’t cheat in the exam.

You must do homework.

You must be kind to your friends.

You must cooperate.

You must take notes.

You must share things.

You mustn’t spit.

You mustn’t eat in the class.

You must bring books.