Bulak, Sahap2024-12-242024-12-2420111300-5766https://hdl.handle.net/20.500.12604/7995In this study, it was focused on the origin of conditional mood suffix - sA, and how its structure came up, by referring to examples from the texts and the studies done by Turkish linguists concerning conditional mood, which is also called as subjunctive-conditional mood. Further, historically, types of personal endings used in conjugation, and structural change of the suffix - sA in the periods of old Turkish, middle Turkish, Karahan Turkish, Harezm Turkish, Kipchak Turkish, Old Oghuz Turkish, Chagatay Turkish, old Anatolian Turkish, and Ottoman Turkish were examined depending on examples in written sources. By emphasizing the conjugation of the suffix in contemporary Turkish dialects; personal suffixes and reinforces which are used in the conjugation of conditional mood in these dialects were examined. More, structural changes of suffixes in contemporary languages, and differences between them are studied.trinfo:eu-repo/semantics/closedAccessGrammarirrealis moodsubjunctive-conditional moodthe suffix-sAthe functions of conditional moodArticle307197N/AWOS:000421852300003