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Modal Verbs - Coggle Diagram
Modal Verbs
Permission
IT’S OK
can
You can smoke in here.
informal
allowed
TO
You’re allowed to smoke in here.
Formal and informal
may
formal
permitted
TO
formal
Past: could / was allowed
Future: will be allowed
Prohibition
IT’S NECESSARY
have to
need to
must
required
You can use these words for “light” requirements and prohibitions – for example, rules that are often not followed
NO OBLIGATION
IT’S NOT NECESSARY
don’t have to
informal
don’t need to
informal
not necessary
formal
not required
formal
optional
formal
Obligation
IT’S NOT OK
can’t
informal
mustn’t
formal
not allowed
formal and informal
not permitted
formal