fall asleep / in class / must / not / you
You must not fall asleep in class.
you / finish / on time / have to / your homework
You have to finish your homework on time.
your phone / you / not / use / in the class / are / allowed to
You are not allowed to use your phone in the class.
have to / to answer / your hand / raise / you
You have to raise your hand to answer.
to / be polite / have to / you / your classmates
You have to be polite to your classmates.
you / speak English / must / in English class
You must speak English in English class.
their homework / students / do / must
Students must do their homework.
in class / eat / you / can't
You can't eat in class.
listen to / must / the teacher / you
You must listen to the teacher.
pay attention / must / in class / you
You must pay attention in class.
mustn't / you / late / be / for the lessons.
You mustn't be late for the lessons.
in the bin / the rubbish / must / you / put
You must put the rubbish in the bin.
chew gum / you / can / not / in class
You can not chew gum in class.
cheat / are / not / you / in exams / allowed to
You are not allowed to cheat in exams.