Ergative case, Aspect and Person splits: Two case studies

Ergativity splits between perfect and imperfective/progressive predicates are observed in languages with a specialized ergative case (Punjabi) and without it (Kurdish). Perfect predicates correspond to a VP projection; external arguments are introduced by means of an oblique case, namely an elementary part-whole predicate saying that the event is 'included by', 'located at' the argument. A more complex organization is found with imperfective/progressive predicates, where a head Asp projects a functional layer and introduces the external argument. Our proposal further yields the 1/2P vs. 3P Person split as a result of the intrinsic ability of 1/2P to serve as 'location-of-event'.