The subject-in-situ generalization and the role of case in driving computations

The article establishes a novel generalization concerning the placement of arguments by Spell-Out. It centers on the principles that force arguments t o leave the VP across languages. The empirical domain consists of construct ions where subject movement is not required for reasons that have to do wit h the Extended Projection Principle. In these environments and whenever a s entence contains both a subject and a direct object, one of the arguments m ust vacate the VP. We argue that argument externalization is related to Cas e. It is forced because movement of both arguments to a single head T-0 tha t contains two active Case features in the covert component is banned.