Sep 02, 2013 · sina, sini, sinu, sinuru, sinure，无任何简化，完美还原完整的词尾形式. 但是到了近现代也还是终于也丢掉了那个重复的r音节，归入了四段。 上一段动词词干由i结尾，这个i带有一定的重音. okia, okii, okiu, okiuru, okiure

Old Japanese is usually defined as the language of the Nara period (710–794), when the capital was Heijō-kyō (now Nara). That is the period of the earliest connected texts in Japanese, the 112 songs included in the Kojiki (712). The other major literary sources of the period are the 128 songs included in the Nihon Shoki (720) and the Man'yōshū (c. 759), a compilation of over …