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