RUN.
SHE MUSTN'T RUN.
USE YOUR PHONE IN CLASS.
YOU MUSTN'T USE YOUR PHONE IN CLASS
WRITE ON THE WALLS.
YOU MUSTN'T WRITE ON THE WALLS
GO TO SCHOOL.
HE MUSTN'T GO TO SCHOOL.
SPEAK ENGLISH IN CLASS.
YOU MUST SPEAK ENGLISH IN CLASS.
PAY ATTENTION IN CLASS.
YOU MUST PAY ATTENTION IN CLASS.
CLEAN YOUR ROOM.
YOU MUST CLEAN YOUR ROOM.
EAT IN CLASS.
YOU MUSTN'T EAT IN CLASS.
BE QUIET AT THE LIBRARY.
YOU MUST BE QUIET AT THE LIBRARY.
BE LATE FOR SCHOOL
YOU MUSTN'T BE LATE FOR SCHOOL