mustn't / you / late / be / for the lessons.
You mustn't be late for the lessons.
your notebooks / must / write in / you
You must write in your notebook.
fight / mustn't / you / in school
You mustn't fight in school.
must / not / you / in school / smoke
You mustn't smoke in school.
listen to / must / the teacher / you
You must listen to the teacher.
run / in the hallway / must / you / not
You must not run in the hallway.
on the desk / write / you / mustn't
You mustn't write on the desk.
a uniform / must / students / wear / in school
Students must wear a uniform in school.
homework / students / do / must
Students must do homework.
you / finish / on time / must / your homework
You must finish your homework on time.
in class / eat / you / mustn't
You mustn't eat in class.
must / in the library / be / you / quiet
You must be quiet in the library.