You must/mustn't...
You must be quite
You must/mustn't
You musn't pick the flowers
You must/mustn't
You musn't walk on the grass
You must/mustn't
You musn't eat
You must/mustn't
You mustn't talk loudly here
You must/mustn't
You mustn't swim here
You must/mustn't
You mustn't use your phone here
You must/mustn't
You mustn't sleep in the class
You must/mustn't
You mustn't ride your bike
You must/mustn't
You must wash your hands
You must/mustn't
You must put litter in the garbage can
