In this paper I will give an analysis of structures involving "why" and "how come". In section two, I will present an analysis of "why" and "how come". In section three, I will show how a wide range of syntactic facts follows from this analysis. In section four, I will show how a number of facts about quantifier interpretation follow from this analysis. In section five, I briefly discuss the analysis of "how come" of Zwicky (1971). Lastly, I will conclude with a discussion of some of the wider implications of my analysis of "how come".
Collins, Chris. 1991. Why and How Come. MIT Working Papers in Linguistics 15, 31-45.