In this paper, I present an argument from Mandarin Chinese for the claim that the double object construction involves more structure than the dative construction (Marantz (1993), Bruening (2001), Miyagawa and Tsujioka (2004)). The evidence involves a contrast between the double object and the dative constructions in the distribution of the distributive quantifier GE 'each'. I propose that GE may adjoin to a vP or a VP (cf. Lin (1998), Kung (1993)), and the distribution of GE may be used to diagnose the presence of a vP or a VP layer. The proposed analysis provides evidence for the existence of the verb-preposition distinction in Mandarin Chinese.