Don't run in the hall (change to modal)
You musn't run in the hall. (obligation)
study / before your final exams
You had better (more serious) / should study before your final exams
She ____________ to attend this class if she doesn't want to.
doesn't have to
I _______ renew my driver's license before it expires.
have got to / must
get / eight hours of sleep / every night
You should get eight hours of sleep every night. (Modals of Advice)
study / two hours / a night
You should study two hours a night (Modal of Advice)
Kevin ________ to watch his little sister when his parents goes out.
Has to (necessity)
If you don't want your dessert you ________ eat it.
don't have to
wear / must / business attire / at the office
You must wear business attire at the office
Doctors _______ wear a mask when they are performing surgery.
Have to / must
Don't play music in class (change to modal)
You shouldn't play music in class
Luca couldn't go to the game because he _______ study.
had to (past neccesity)
Don't eat during the lesson (change to modal)
You shouldn't eat during the lesson.
Layla couldn't go out last night because she ________ for her English exam.
had to