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modal verbs - Coggle Diagram
modal verbs
ABILITY
I can speak English
I can play the piano
can you drive?
ADVICE
should / shouldn't
you should take a holiday
you shouldn't eat too many sweets
OBLIGATION
must
I must call my sister later
= I decide
"a must"
have to
I have to go to the bank
not my choice
I had to (past)
I will have to (future)
PERMISSION
can
may
(more polite)
may I? Puis-je?
PROHIBITION
mustn't
you mustn't tell anyone (my secret)
you mustn't murder
can't
you can't smoke in public paces
NECESSITY
need
I need/she needs
I need to speak to my client
we needed to stop for petrol
I need more money
we don't need to do it
full verb and auxiliary
we needn't do it now
NO OBLIGATION
don't have to
(you can if you want)
you can come with me, but you don't have to