I ...... study this weekend. It's my obligation as a student. (must-have to / should / mustn't)
must/have to
You ...... feed the animals in the Zoo. It's forbiden!
(must / mustn't / don't have to)
mustn't
I ...... make my bed every morning. I know my parents need help at home.
(don't have to / must-have to / should)
must-have to
You ...... do exercise every day. It's good for you!
(must / should / shouldn't)
should
You ...... listen to loud music. It's bad for your ears!
(don't have to / have to / shouldn't)
shouldn't
You ...... help me now. Mum helped me this morning.
(don't have to / mustn't / must)
don't have to
She ...... wear a uniform at school. She can wear jeans.
(must-have to / doesn't have to / should)
doesn't have to
You ...... eat fast food every day. It's bad for you!
(mustn't / shouldn't / must)
shouldn't
You ...... use your mobile phone in a plane.
(don't have to / mustn't / should)
mustn't
They ...... study harder if they want to pass their exam.
(shouldn't / must - have to / don't have to)
must - have to
If you are feeling sick, you ....... go to the doctor!
(should / shouldn't / mustn't)
should
If you have an important exam tomorrow, you ...... go to bed late!
(don't have to / must / shouldn't)
shouldn't
My husband is cooking tonight so I ...... do it!
(don't have to / should / must)
don't have to
You ...... start a fire in this forest. It is prohibited.
(shouldn't / don't have to / mustn't)
mustn't
If Tom wants to be a doctor, he ...... finish university.
(must-has to / doesn't have to / mustn't)
must-has to
She ...... wake up early today - it's Sunday.
(mustn't / doesn't have to / must - has to)
doesn't have to
