You must/mustn't help others when they ask for help.
must
You must/mustn't always be kind to your classmates and teachers.
must
You must/mustn't sleep in class.
mustn't
You must/mustn't eat in class.
mustn't
You must/mustn't be bad to others.
mustn't
You must/mustn't forget your homework, books and pens at home.
mustn't
You must/mustn't talk when your teacher is speaking.
mustn't
You must/mustn't run and shout in class and at school.
mustn't
You must/mustn't be good with your classmates .
must
You must/mustn't know what is good and bad and stand behind your actions.
must
You must/mustn't break or spoil the school property.
mustn't
You must/mustn't speak when your classmate is answering the teacher's question.
mustn't
You must/mustn't fight in class.
mustn't
You must/mustn't do your homework every day.
must
You must/mustn't listen when your teacher is speaking.
must
You must/mustn't bring your books to school.
must
You must/mustn't be clean and calm.
must
You must/mustn't cheat in class.
mustn't
You must/mustn't bring your pens to school.
mustn't
You must/mustn't raise your hand to spea.
must
You must/mustn't be helpful.
must
You must/mustn't interrupt your teacher and classmates when they speak.
mustn't