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Modal Verbs - Coggle Diagram
Modal Verbs
PROHIBITION
can't
mustn't
you mustn't smoke inside
ADVICE
should
you should stop smoking!
shouldn't
could (pourrait)
PERMISSION
can
may
(more polite)
OBLIGATION
have to
I have to go to work
I have to pay tax
(=imposed)
had to
will have to
must
I must go to work
I must call my sister tonight
you must watch that film
(= I decide)
NO OBLIGATION
don't have to
= you can if you want
NECESSITY
need
(semi-modal)
I need / she needs - I needed
I don't need (to go) / I needn't go