In this paper we would like to present a proposal for the representation of verbal lexical meaning in a Lexical Knowledge Base. We start from the hypothesis that the verbal lexical meaning is the sum of different levels of semantic description: Argument Structure, Event Structure, Selectional Restrictions and Compositional Semantics. Our talk is based on the representation of the Compositional Semantic level (VRQS), the decomposition of the meaning into semantic components and the way in which they are saturated in Spanish. We will present three different types of saturation (argumental, morphological and understood) and we will try to demonstrate how these sorts of saturation have different syntactic consequences.