Hello, As an American, I have a nagging curiosity about conventions of British English -- In response to a question like, "Would you have gone to the party had you known that she would be there?", is it common for Brits to say "Ya, I would have done."? (I'm specifically interested in the inclusion of the past participle) I know that I'm much more likely to say "Yeah, I would have," but when I listen to or watch British media, I think I've noticed the pattern above. Is that right? Is this a real bit of difference between our two flavors of the language?