The study examines yes/no questions in the Ẹ́dó language with the aim of identifying the morphemes that function as yes/no question markers. Relying on primary data generated from a survey, the study proposes that there are five overt yes/no question markers in the language. Four of these question markers (té, yí, rà, and kué) have been discussed in the literature, but this study provides a different account of the role of té in polar questions, and suggests that another morpheme, i.e., nè can be classified as a yes/no question marker. Furthermore, the study reveals that the question markers are homonyms of other lexical and functional words. This has implications for the distribution of the question markers, as the co-occurrence with their homonyms yields unacceptable sentences. The paper describes this constraint on the use of the markers within the framework of Distributed Morphology.
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