Na przykład:
- you mustn't smoke in a classroom.
- you must wear the uniform.
- you must listen to your teachers.
- you mustn't bring alkohol to school.
- you must behavior good.
- you must be polite to your classmates.
- you mustn't listen to mp3 player during lessons.
1. On the lesson you must says teacher.
2. You mustn't run at the hall.
3. You mustn't eat in the class.
4. You must have homework on the lesson.
5. You must be polite.