形容詞終止形一段活用の発生要因 ― 九州方言を中心として ―

要旨

The eastern Kyushu dialects are regions with the "i" word endings. A henomenon called "non-declension"（Itoi 1969） can be observed mainly in Miyazaki Prefecture, which is an "i" word ending region. This is the single tier declension of adjectives as the stem. For example, TAKAI is conjugated as TAKE（end-form）, TAKE-KAQTA（past tense-form）, TAKE-NE（negative-form）, TAKE-NARU（conjunctive-form）, and TAKE-KERYA （subjunctive-form）. This phenomenon can also be observed in the Tohoku region and southeastern Kyushu（especially southern Miyazaki and eastern Kagoshima prefectures）, where the distribution is ABA. The Tohoku and southeastern Kyushu regions share the same /syllabeme dialect/ and /"i" word endings/. As a result of analyzing the mechanism of the single tier declension of adjectives based on previous studies and a survey conducted in Miyazaki City, it was found that the main cause of the phenomenon was that the distinction between word and stem became ambiguous due to contraction of the "i" word endings.

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