In this book leading scholars address the issues surrounding the syntax-phonology interface. These principally concern whether the phonological component can influence syntax and if so how far and in what ways: such questions are a prominent component of current work on the biolinguistics of speech production and reception. The problematic relationship between syntax and phonology has long piqued the interest of syntacticians and phonologists: the connections between sound and structure have played a key role in generative grammar from its inception, initially relating to focus and the prosodic marking of constituent structure and more recently to word-order constraints. This book advances this work in a series of critical and interlinked presentations of the latest thinking and research. In doing so it draws on data from a wide range of languages, evidence from disordered language, and related work in language acquisition.