In this paper I present five alternations of the verb system of Modern Greek, which are recurrently mapped on the syntactic frame NPi__NP. The actual claim is that only the participation in alternations and/or the allocation to an alternation variant can reliably determine the relation between a verb derivative and its base. In the second part, the conceptual structures and semantic/situational fields of a large number of “-ízo” derivatives appearing inside alternation classes are presented. The restricted character of the conceptual and situational preferences inside alternations classes suggests the dominant character of the alternations component
