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Modals and Modal Perfect (Modal perfect (Can't/ couldn't have,…
Modals and Modal Perfect
Possibility/Ability/request
be able to
could
can/can't
may
might
Would
Necessity/ obligation
negative
mustn't
needn't
positive
need to
have to
advice
Should
Ought to
Modal perfect
Can't/ couldn't have
may/might have
Could have
must have
shouldn't have
should/ought to have
would have