Main Clause Phenomena: New Horizons takes the study of Main Clause Phenomena (MCP) into the 21st century, without neglecting the origins of the topic. It brings together work by both established and up-and-coming scholars, who present analyses for a wide range of MCP, from a variety of languages, with a particular focus on particles and agreement markers, complementizers and verb second, and the licensing of MCP in different types of clauses. Besides enriching the empirical domain, this volume also engages with the theoretical question of how best to capture the distribution of MCP and, in particular, to what extent they are embeddable and why. The diverse patterns and analyses presented challenge the idea that MCP constitute a homogeneous class. Main Clause Phenomena: New Horizons is of interest not just to scholars specializing in the study of MCP, but to all linguists interested in the syntax and/or semantics of the clause.