It is against the rules to smoke in here. You ...... do it! 喫煙は規則違反です
don't have to
must not
must / have to
You ...... feed the animals in the Zoo. It's forbiden! feed=動物に餌
must / have to
must not
don't have to
They ...... study harder if they want to pass their exam. (試験に合格する)
must / have to
must not
don't have to
You ...... help me now. Mum helped me this morning. (母はすでに私を助けてくれた)
don't have to
must
mustn't
Children ...... go to school.
must / have to
must not
don't have to
You ...... carry your umbrella - it's a sunny day!
must / have to
must not
don't have to
I ...... make my bed every morning. I know my parents need help at home.
must / have to
don't have to
must not
You ...... use your phone in a plane.
must not
don't have to
have to / must
I ...... study this weekend. I have a test on Monday!
mustn't
must / have to
don't have to
The team ...... score 5 more points if they want to win!
must / has to
must not
doesn't have to
You ...... start a fire in this forest. It is prohibited. (禁止）
don't have to
have to
must not
She ...... wake up early today - it's Sunday. （日曜日＝休み）
doesn't have to
mustn't
must / have to
If Tom wants to be a doctor, he ...... finish university. トムは医者になりたいです...
doesn't have to
must / has to
must not
My husband is cooking tonight so I ...... do it!
must
have to
don't have to
She ...... finish her homework if she wants to go out. 彼女は外出したいなら宿題を終わらせなければならない
must / has to
doesn't have to
mustn't
She ...... wear a uniform at school. She can wear jeans. (制服のない学校)
must / have to
must not
doesn't have to