Discontinuity is a common phenomenon in English, and many schools have described and explained it from different approaches.The Cardiff Grammar develops a relatively comprehensive theory of functional syntax and it contributes to the study of discontinuity.This paper is dedicated to investigating discontinuity in the Cardiff Grammar, i.e.revealing the nature of discontinuity, making a classification of various types of discontinuity and discussing discontinuity in "verbal groups".Description and discussion of various types of discontinuity are conducted from a functional perspective.