For languages in the nomina- e class, it's clear that 'subject' and 'object' are valid cat- egories: in the last two sections we've seen a number of illustrations of both case and verb agreement operating in terms of a subject/object split The examples seen so far show that certain languages are morphologi cally nomina This means that the characteristic Aslo split is indicated by changes in the morphology the form of the NPs case marking) or of the head verb (by agreement), or indeed by marking on both NPs and verbs