1. I can't either OR Neither can I OR Nor can I. The rest are wrong. 2. We haven't either OR Neither have we OR Nor have I (assuming that only one person is being referred to. The rest are wrong. 3. It's the statement that's wrong here. You probably meant "I went to Paris last year", in which case the reply should be "So did I". "Me too" is OK in conversation. If you meant "I was in P