Is the sentence "We're done" grammatically correct? [duplicate]

Solution 1:

Yes. Done here means finished and has been used with this meaning since the 14th century, and no one batted an eyelid till 1917. It has been used by Dickens and Mark Twain amongst others, not to mention in the proverb:

Man's work lasts till set of sun, woman's work is never done.

See MWDEU - http://books.google.com/books?id=2yJusP0vrdgC&pg=PA361

Solution 2:

Done here isn't treated as a verb, but as an adjective. According to OALD:

done (adjective)

1 finished; completed

When you're done, perhaps I can say something.