The quadrigraded conjugation verbs and the attributive form of adjectives of the dialects in the Togoku region such as 'Ta to tsuku' ('Tatsu to tsuki' [the new moon comes]) and 'Kanashike imo' ('Itoshii Imoto' [my sweet younger sister]) take unique forms different from the standard Japanese; on the other hand, it is known that the Hachijo dialect spoken in Hachijo-jima island such as 'Kakotoki' ('Kakutoki' [when man writes]) and 'Takake yama' ('Takaki Yama' [a high mountain]) takes the same form as that of the ancient dialects of the Togoku region.
また、東国方言の四段動詞と形容詞の連体形は、「立と月」「愛（かな）しけ妹（いも）」のように中央語とは異なる独特の語形を取るが、八丈島で話される八丈方言は「書こ時」「高け山」のように、上代東国方言と同様の語形を取ることで知られている。