This paper points out the stipulative nature of Ahn's(1991) explanation of his three observations on the distribution of verbal nouns with respect to the light verb ha. It then argues that a principled account of the facts can be found in Hale & Keyser's Lexical Relational Structure theory where the Davidsonian evenet-state distinction is categorially instantiated and the lexical categorial projection is constrained by syntactic principles. It further shows that Korean has a phrasal ellipsis licensed by ha.