1. Fill in the gaps with the correct form MUST or
HAVE TO:
1. You _____________ ( stop ) when the traffic
lights are red because it is illegal to go on driving.
2. She _____________ ( wear ) formal clothes
because they make her look more sophisticated.
3. He ______________ ( wear ) a suit and a tie
at work because this is one of the rules at work.
4. I _______________ ( tidy up ) my room
because I don’t like sitting in a messy room.
5. Children _____________ ( make ) their beds
every morning otherwise their teacher punishes.
6. My father ____________ ( pay ) the
electricity bill by Friday because if he doesn’t,
they will cut the electricity .
7. I ____________ ( pass ) my final exam
because my parents will get angry if I fail it.
8. We _____________( fasten ) our seatbelts
while driving because it is illegal not to fasten it.
9. Leonardo ___________ ( have ) short hair in
the army. It is the rule of the army.
10. Kate ___________ ( buy ) a computer
because it can be useful for her job.
Prohibitions:
*You mustn’t smoke here because it is illegal.
*She mustn’t wear casual clothes at school
because it is against the school regulations.
Lack of necessity:
*You don’t have to have short hair at school
you can have long hair if you want.
*She doesn’t have to wear formal clothes at
work because her boss lets her wear
whatever she wants.
Fill in the gaps with the correct form
MUSTN’T or DON’T/DOESN’T HAVE TO:
1. You ____________ ( cross ) the street
when the traffic lights are red.
2. Carol ______________ ( take ) Science
exam because last year she passed it with
the highest mark.
3. I ________________ ( be ) a very social
student because there is no rule.
4. Daniel ______________ ( drive ) a car
because he is just 16 years old.
5. We _____________ ( pay ) extra money
for using the swimming pool ; it’s free.
6. You ______________ ( wait ) for me , if
you want you can go.
7. Andrew ____________ ( enter ) a pub
because he isn’t over 18.
8. You ______________ ( take ) a photo in
a museum because it’s prohibited.
9. Lucy ______________ ( work ) because
she is married to a millionaire.
10. They ______________ ( go ) abroad
without passport and visa.
