Subject+must or musn't+Verb+Object

*You are ill, you must see the doctor.
*Children must keep their rooms tidy.
*You must pay the bill before you leave the restaurant.
*You must do your homework.
*You must visit the art gallery.
*You mustn't be late for school.
*You mustn't eat food in class.
*We must go on holiday next month.
*I must study lesson