At least three DOM-related constructions can be observed in Ancient Greek, but only one of them has received due consideration in the DOM bibliography (Bossong 1998). In this paper I will deal with the other two: the partitive genitive and a borderline instance of alternation in case marking of objects due to aspectual and affectedness variations in the interpretation of the predicate. I will also deal with the relation of the neuter accusative of unspecific objects with DOM, a relatively neglected construction. Central to the relation of Ancient Greek with DOM is the fact that its case marking is both universal and obligatory (or “symmetrical” in two different uses of the term). This explains why in Ancient Greek the functions differentiated by DOM are not Subject and Object, but Object and Extensions to core. Following other authors, I present here some examples of Spanish that show how the “differentiating” function (Comrie 1989) is not enough to explain DOM, even in the classical example of a DOM system, thus making clear the necessity to include constructions as the two mentioned above in a comprehensive definition of DOM.
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