past participle of do (v.); from Old English past participle gedon (a vestige of the prefix is in ado). U.S. Southern use of done in phrases like "he done gone to the store" is attested from 1827, according to OED: "a perfective auxiliary or with adverbial force in the sense 'already; completely.' " Meaning "finished" is early 15c. Slang done for "doomed" is from 1842.
1. A fellow doesn't last long on what he has done. He's got to keep on delivering as he goes along.--Carl Hubbell, Baseball Player
2. I feel it's done me good to get it off my chest.
3. This can be done if you proceed as follows.
4. Children at school receive coloured stars for work well done.
5. She has done more to divide the Conservatives than anyone else.