Predication under control: the case of Polish

This paper is concerned with case properties of predicative adjectives in control. In subject control, adjectives appear either in agreeing case or instrumental; in object control only the latter is licensed. It is shown that control embeds predication and therefore follows simple predicational rules. In Polish, predicative nouns appear in instrumental, whereas predicative adjectives agree with their subjects. It is thus argued that only agreeing adjectives in control constitute APs, whereas instrumental adjectives in control are actually modifiers of DPs whose head noun can be optionally elided.