You smoke.
mustn't/must not
don't have to
have to
You fall asleep in class.
mustn't
You wear a helmet.
You have to wear a helmet.
You study English.
don't have to
He study English.
mustn't
doesn't have to
has to
don't have to
You show respect to everyone.
must
mustn't
don't have to
You be kind.
don't have to
have to
mustn't
must
You wear a seatbelt.
have to
You be late for class.
mustn't/must not
You play computer games all night.
don't have to
mustn't
You get too close to a crocodile.
mustn't
don't have to
have to
must
They buy a house
have to
mustn't
don't have to
doesn't have to
You fight.
mustn't
You be quiet in the library.
must
You have a pet cat.
don't have to
must
have to
It's raining! He take an umbrella.
have to
has to
don't have to
doesn't have to
