This paper discusses telicity and perfectivity in Estonian. Neither of these categories corresponds exactly to the Estonian object case alternation, which is argued to reflect predicate or clause aspectual properties and not the NP-related properties of objects. The aim of this account is to accommodate the systematic compatibility of verb classes with certain clausal aspectual object case marking patterns. The paper proposes a way of understanding the interaction between verbal and clausal aspect in terms of boundedness and formalizes it in the framework of Lexical Functional Grammar (LFG). The features of verbs and case markers determine the clausal aspect from different constituents at the syntactic level of constituent structure. The information is unified at another syntactic level, functional structure.
