Add to ORKGThe purpose of this study is to offer a proposal for the rationalizing a hypothesis on the proliferation of zero morpheme in an effort to verify the details of universal validity within the limits of grammatical categories, singling out several problems in the application of the assumptions for the analysis by means of the Basque auxiliary verb conjugation, concerning the morpho-syntactic fusion complexity represented with various particles and formatives which show unique idiosyncracy of distinctive properties of the Basque auxiliary verbs, especially in the case of Nor-Nork and Nor-Nori-Nork form of the auxiliary verb, investigating the relation between underlying argument structure and auxiliary form of the Unified Basque (Euskara Batua)...