simultaneous preposition postposition pashto m analysis nominal construction language np both preposition postposition example pashto construction follow herbert penzl grammar pashto washington d c american council learn society p sarrus te man man preposition sometime optional though postposition obligatory since pashto headfinal unmark word order sov s tempt postposition facevalue however bind fact suggest phrase contain np postposition referential possible analyze postposition kind case marker understand distinction between homophonous case marker postposition japanese example d grateful anyone suggest article deal construction linguist study pashto d hear thank help taylor robert trobert mit edu 