This paper seeks to discover the rules active in the formation of tags (intonation tags, declarative tags, and tag questions) in English. The author discusses former analyses of these constructions and presents his own thoughts with many examples, concluding that English has at least two tag formation rules: one that accounts (perhaps inadequately) for both declarative and intonation tags, and another that accounts (in not totally understood ways) for tag questions. An appendix lists the verbs which, in the author's opinion, can take complement tags. A bibliography is included. (Author/VM)