passive, and potential, and these intransitive forms conjugated in the 下二段活用 (shimo nidan katsuyō, lower bigrade conjugation pattern) of the Classical...

(上一段, kami ichidan), Lower monograde (下一段, shimo ichidan), Upper bigrade (上二段, kami nidan), Lower bigrade (下二段, shimo nidan). There were also 4 "irregular"...

imperative form is rare, but is used. 灯（とう）台（だい） Toudai 下（もと） moto 暗（くら）し kurashi 灯（とう）台（だい） 下（もと） 暗（くら）し Toudai moto kurashi The particle は is omitted...

bigrade verbs (upper bigrade (上二段, kaminidan) (sometimes also known as "middle bigrade" (中二段, nakanidan)) and lower bigrade (下二段, shimonidan)). Dictionaries...

(ラ行五段活用). One should avoid confusing verbs in ra-column 5-row conjugation (ラ行五段活用) with verbs in i-row conjugation (上一段活用) or e-row conjugation (下一段活用)....