You must/mustn't sleep in class.
Mustn't
You must/mustn't listen to your teacher.
Must
You must/mustn't be quiet in the library.
Must
You must/mustn't walk on the grass.
Mustn't
You must/mustn't run across the road.
Mustn't
You must/mustn't fight with other children.
Mustn't
You must/mustn't pick flowers from someones garden.
Mustn't
You must/mustn't talk in class.
Mustn't
You must/mustn't use your mobile phone at school.
Mustn't
You must/mustn't run in the hallway at school.
Mustn't
You must/mustn't look after your pets.
Must
You must/mustn't go fishing in the lake.
Mustn't
You must/mustn't put your rubbish in the bin.
Must
You must/mustn't do your homework.
Must
You must/mustn't keep your bedroom tidy.
Must
You must/mustn't be on time for class.
Must