Напишите несколько предложений что вы должны делать а что нет (6 предложений можно, но лучше 10) : must-должен, must not-не должен)

I must do good things, but I must not do bad things.
I must help my mother, but I must not hurt my sister.
I must be a best student, but I must not be a bed student.
I must do my homework, but I must not be a bad.
I must go to school, but I must not kick my friend.
I must learn poems, but I must not jump out of the garage.