Chong, Song-Yun. 1988. Connected Speech and Lexical Phonology. Studies in Modern Grammatical Theories 12, 19-37. In this paper I describe several aspects of the postlexical phonology in conjunction with Connected Speech(CS). As a first step to explicate the interaction between words when they are strung together into CS, I, following Kaisse(1990), segregate the rules of CS into two types, namely, Registerdependent rule which is sensitive to syntactic information and Rate-dependent rule sensitive to phonological environment. Secondly, to utilize the two types of rules properly in postlexical domain, I argue that postlexical rules in current Lexical Phonology should be further elaborated by postulating two levels; P1 and P2 levels. In P1 level, rules are applicable for cliticization (the main proposition in this paper) and phonological word(or phrase) (e.g. stress system, intonation, and other prosodic structure). In P2 level, pure phonological rules(such as flapping, vowel nasalization, nasal deletion, word-final stop deletion) are optionally operated. In between P1 and P2, the Pause should be inserted in order to preserve the linguistic structure. To establish the proposed corollary, I present every possible argument and, thus, confirm that the theoretical basis is justifiable.