a1 University of Michigan
One of the most important types of grammatical process in the languages of the world is that involving the intransitivization of a transitive verb and the deletion or demotion of its subject or direct object. The first such process to be analysed was passivization, involving the demotion of a transitive subject to an oblique role or its deletion altogether; this process is central to all linguistic theories and has been known as long as linguistics has been studied.
(Received June 10 1987)
(Revised September 29 1987)
* The research for this paper was supported by a grant from Language Learning. I thank Anggit Mustikaningrum, John Verhaar, Nigel Vincent and John Wolff for their helpful comments on earlier drafts of this paper.