Правила поведение в школе на сmust ,mustn't

You mustn't eat on the desk.
You mustn't talk in class
You must wear uniform.

You must speak corractly
You must hear teachers
You must do your homework
You must be quietly
You mustn't speak so loudly
You mustn't run at school
You mustn't argue with teaches
You mustn't eat during the lesson
You must wear uniform