Re: 'there' in short answers
No - we don't usually repeat the subject.
Is Peter going with you? No, Peter isn't. (We would not say that - we'd say "No, he isn't.)
Has Sarah fed the dog yet? Yes, Sarah has. (We would not say that - we'd say "Yes, she has.")
I agree that "there" is not what most people think of as a personal pronoun, but we certainly do not repeat the subject.
Last edited by Barb_D; 23-Dec-2012 at 20:46.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.