Central and Western Basque (CWB) dialects have a verb focalization construction involving the dummy verb egin, which as a lexical verb is akin to English ‘make ’ or ‘do. ’ (Rebuschi 1984, Ortiz de Urbina 1989, Zuazo 1998, Etxepare and Ortiz de Urbina 2003). An example of this construction is given in (1), which Ortiz de Urbina (1989) gives as a felicitous answer to the question, “What happened to your father?” (1) Hil egin da gure aita. die do AUX our father ‘Our father has DIED.’ The goal of this paper is to explain how do-support comes about in sentences of this kind. In particular, this paper argues that Central and Western Basque dialects, along with Korean, form a class of do-support languages whose dummy verb insertion mechanism ...