This book consists of two parts. The first, theoretical part has two main aims: (1) to discuss the problems of pragmatic competence and define its unit, i.e. the utterance-type, and (2) to characterize utterance-types in the communicative language use. The particular realizations of utterance-types in real communicative situations are utterance tokens which can be considered performance-units. The second part of the book tries to develop a methodology with a high heuristic power how to segment spoken discourses into utterance-tokens on the basis of the theoretical considerations on utterance-types treated in the first, theoretical part of the book.