Don't eat during the lesson (change to modal, obligation)
You must not eat during the lesson.
Luca can not go to the game because he _______ study.( obligation, study)
must study
Doctors _______ wear a mask when they are performing surgery. (obligation)
Have to / must
Don't run in the corridor (change to modal, advice))
you shouldn't run in the cooridor.
Layla ______ out to night ( no ability, go) because she ________ for her English exam. ( obligation, study)
can not go, has to study
Ken is really sick, he ________ to a docotor ( go, advice)
should go to a doctor
When she lived in Brazil, she ________ to work (walk) (obligation in past)
had to walk
get / eight hours of sleep / every night ( strong advise)
You ought to get eight hours of sleep every night. (Modals of Advice)
If you don't want your dessert you ________ eat it. (no obligation, no necessity)
don't have to
I _______ my driver's license before it expires.( obligation, renew)
must
I am so tired. I _________ a nap before w e leave. ( take, advice)
should take
wear / must / business attire / at the office
You must wear business attire at the office
Kevin ________ _____ his little sister when his parents goes out. ( obligtion, watch)
Has to (obligation)
study / before your final exams( obligation)
you must/ have to study before the exams
Don't play music in class (change to modal, advice)
You shouldn't play music in class
study / two hours / a night( strong advice against
You ought not to study two hours a night (Modal of Advice)
She ____________ this class if she doesn't want to. (no obligation, no necessity, attend)
doesn't have to