I don't smoke and I don't drink, either. (= I neither smoke nor drink.) 我不抽烟也不喝酒。
This dress is expensive, and that one is, too.
This dress isn't cheap, and that one isn't, either.
In fact, this dress isn't cheap and it isn't good, either.
I don't like carrot, and I don't like celery, either.
I seldom go to concerts. Me either. 我很少去听音乐会。 我也是。
I have nothing to do with it. Me either.