Obligation
must/mustn't
must/mustn't
You _____ give your pet food and water every day.
must
There is no homework, so I ______ go out with you this afternoon.
can
At school, we ____ wear uniforms. We can wear jeans.
don't have to
You ____ turn on the central heating. It's automatic.
don't have to
You ____ cross the road when the red light is showing.
mustn't
You ____ eat a lot of chocolate. It isn't good for your teeth.
mustn't
You ____ go to the doctor if you are very ill.
must
You ____ wear swimming suits in the public swimming pool.
have to / must
I can't fail the exams. I ____ study harder.
must/have to
Sorry, I ____ go now or I will be late.
must / have to
The bus is coming, so I ____ hurry.
must
Anne _____ ride a bike because she is only two years old.
can't
you ____ wear boots when it rains, but your feet will probably get wet.
don't have to
You _____ forget your documents. You need them to get on the plane.
mustn't
I ____ wear glasses because I can't see without them.
have to / must
People tell their children they ____ throw things in the street.
mustn't
You _____ play on the road. There are a lot of cars.
mustn't / can't
You _____ read a lot of books if you want a degree in English literature.
have to / must
Students _____ listen to the teacher, or they won't understand.
must / have to
I ____ see without glasses. I've got bad eyesight.
can't
You ____ cross the street without looking for cars.
mustn't
It's sunny. We ___ go to the beach today.
can
The roads are completely clear of snow, so you____ clean it now.
don't have to
Soldiers _____ obey orders.
have to / must
At a hotel
You _____ bring towels; You _____ swim in the pool;
You _____ make noise after 7pm;
don't have to; can; mustn't