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modal verbs - Coggle Diagram
modal verbs
POSSIBILITY / PROBABILITY
might
may
take your umbrella, it might rain
I don't know, I might watch a movie
could
should
must
NO OBLIGATION
don't have to
= you can if you want
you can come with me, but you don't have to
PERMISSION / ABILITY
can
could
be able to
I can drive/ play the piano
may
(more polite)
OBLIGATION
must
I must call my sister this week
(I think it's an obligation)
you must this film!
have to
I have to pay my tax
(it's necessary)
had to / will have to
PROHIBITION
mustn't
can't
you can't smoke here
ADVICE
ought to
would (...if)
if I were you, I would...
you ought to call her to apologise
I think you ought to
should / shouldn't
you should stop smoking
you should watch films in English
necessity
need
(semi-modal)
you needn't do it
you don't need to do it
I need / she needs
we needed
we won't need it
we needn't have done it