I must go to school.
My father must works.
My mother must cooks.
I must do my homework.
I must clean my room.
I mustn't run in my room.
I mustn't go in supermarket one a week.
I mustn't go to school at Saturday and Sunday.
I mustn't wake up at 6 ocloc'k.
I mustn't drink a coffee at night.
It's all)))