Chapter 10 continues with the discussion of prosodic phonology, but shifts the focus to the issue of how prosody relates to constituent structure in Korean. Korean is interesting because various segmental alternations are sensitive to different prosodic levels, thus providing a test case for prosodic phonology. Lenis stop voicing is a segmental alternation that correlates with the presence of a phonological phrase (Silva 1988; Cho 1990; inter alia). Moreover, intonation patterns coupled with segmental alternations supplant additional data for understanding prosodic structure in Korean. In Seoul Korean, an accentual phrase has been argued to have an LHLH accent; this unit also correlates with segmental alternations such as lenis stop voicing (Jun 1993). The sentence phonology of Korean offers insights into the general issue of the prosody-syntax interface and provides many kinds of evidence on how constituent structure affects the organization of sentence phonology. The chapter first reviews earlier research, then proposes a revised version of the general theory of the prosody-syntax interface.