Topics: Expressing Obligation and Modals
We use must/mustn’t to express:
A. obligation or duty, very strong advice, prohibition
B. prohibition
C. necessity
D. lack of necessity
Preview next quiz:
These are the examples of expressing obligation, except…
A. You shouldn’t do that
B. Really, must give up drinking coffee milk
C. We have to sleep before 10 p.m
D. She must wash her hands before eating