Kilba equational sentences

Kilba, a Chadic language of Gongola State, Nigeria, has a number of enclitic particles which one can reasonably argue function as copulas in equational sentences.Li and Thompson [1977] Baby Grooming have described a widespread phenomenon in language history whereby anaphoric elements become copulas.The copular particles of Kilba present a particularly interesting case of this phenomenon in that, first, proximal/distal distinctions of the demonstratives from which the copulas derive have shifted to tense distinctions in equational sentences, and second, the original pronominal and the innovative copular functions are not clearly Accessories separable, creating functional ambiguity.