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Modal Verbs Uses Examples

Must/mustn’t Necessity
➔ Obligation We must do online learning now.
➔ Logical necessity We must obey the rules.

Should/shouldn’t Less strong obligations (not I think you should turn on your
necessary but good to perform) computer.

Can Possibility
● Ability She can use Zoom.
● Permission You can watch videos on Youtube.
● General possibility Online learning can be real.

Could Possibility
➢ Ability (past tense of ​can​) We could connect to the Internet since
yesterday.
➢ Permission You could watch videos on Youtube.
➢ Present/future possibility We could return to our classrooms.