Difference between can and may

[LinhGiang]

hello,

I am confused with the difference between Can and May

Can you explain to me?

thanks

[Conchita]

In a sentence like 'Can/may I leave the room, please?', both 'can' and 'may' have the sense of 'will you give me permission (to leave the room)?'. Only, 'may' is more formal and less common.

For more on this point, see the following thread:

When I can use 'may' and when 'can'?
http://www.english-test.net/forum/ftopic8452.html