6.5 Modal verbs for obligation and permission
1 Choose the correct option.
0 The sign says you mustn’t / needn’t take photos in the museum. It’s
not allowed.
1 I can/can’t come into town with you tomorrow. My mum’s asked me
to help her at home.
2 I have to / needn’t email my brother in the US today — it’s his
birthday!
3 For this shopping trip, Tim mustn’t / doesn’t have to leave his wallet
at home like he did last time!
4 Do we have to / Can we go to the beach again tomorrow? Please say
yes!
5 Sarah doesn’t have to / mustn’t get the bus home from the airport
because her dad’s collecting her.
2 Complete the second sentence so that it has a similar meaning to the
first. Use modal verbs.
0 . Don’t be late for school again!
. You mustn’t be late for school again!
1 • Do I need to do anything else today?
. Do
anything else today?
2 Police officers wear a uniform. It’s compulsory.
— Police officers
a uniform.
3 . You needn’t wear a suit to the party.
. You
a suit to the party.
4 4 . It’s not permitted to drive into the city centre this weekend.
. You
into the city centre this weekend.
5 • Pupils are permitted to use mobiles in the playground.
• Pupils
mobiles in the playground.
Pupils must to wear school uniform.
Teachers must to be kind.
Pupils have to do their hometask.
Teachers have to be on their lessons on time.
Pupils can be noisy sometimes.
Teachers can be angry.