obligation
must/mustn't
Mustn't/don't have to
necessity or obligation
have to/don't have to
obligation
must/mustn't/have to/don't have to
100
You _____ give your pet food and water every day.
must
100

It will be easy to find their house because there is satnav and Google Maps. We ______________ worry.

don't have to

100

At school, we ____ wear uniforms. We can wear jeans and T-shirts.

don't have to

100
You ____ turn on the central heating. It's automatic.
don't have to
200
You ____ eat a lot of chocolate. It isn't good for your teeth.
mustn't
200

You ___ come to the meeting but it would help us all if you’re there.


don't have to

200

You ____ wear a swimming cap in the communal swimming pool.

have to

200
The exams are next week. I ____ work harder.
must
300
The bus is coming, so I ____ hurry.
must
300

We __________ open the door before the train stops.

mustn't

300

She ____ wear snow boots when it snows, but her feet will probably get wet.

doesn't have to

300

I _____ forget your umbrella. It's going to rain.

mustn't

400
People tell their children they ____ throw things in the street.
mustn't
400

I _____ play on the road. There are a lot of cars.

mustn't

400

Juan _____ reads a lot of books if he wants a degree in English literature.

has to

400
Students _____ listen to the teacher, or they won't understand.
must
500
You ____ cross the street without looking for cars.
mustn't
500

You ____________ tell Niki about the party; I've already told her.

DON'T HAVE TO

500
The roads are completely clear of snow, so you____ put snow chains on your tyres.
don't have to
500
Soldiers _____ obey orders.
have to
M
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