There is often confusion over the words 'can' and 'may'.
Can
The word 'can' is used to denote ability.
I can swim.
(I have the ability to swim.)
Can he lift
150 kgs?
(Does he have the ability to lift 150 kgs?)
May
The word 'may' is used to denote permission.
You may swim
in this river.
(You are allowed to swim in this river.)
May I have a
biscuit?
(Am I permitted to have a biscuit?)
Can for Permission (Informal Setting)
These days, however, the word 'can' is used for both ability and
permission, particularly in an informal setting.
You can swim
in this river.
(You are allowed to swim in this river.)
Can I have a
biscuit?
(Am I permitted to have a biscuit?)
Always May for Permission in a Formal Setting
In a formal setting or in polite company, you should use 'may' to denote permission.
May I leave
the table?
(Am I permitted to leave the table?)
Select the correct version:
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AUXILIARY VERBS
'Can' is an auxiliary verb
meaning 'to be able to'. 'May' is an auxiliary verb meaning 'to be permitted to'.
"Can I go outside, grandma?"
"You can. You're just not allowed."
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