I was looking at a website for beku and bekarazu, however, I think bekarazu is the zu form of beku and it just doesn't make sense. I would make it べかず instead of べからず because it appeared on a website that the zu form is just the negative form, but instead of nai, zu is attached to the verb. Can someone answer my confusion?


1 Answer 1


べく is the adverbial form of べし, which is, as a 形容詞, also regularised to べい dialectally. べからず simply consists of べく+あらず, the latter being the verb in use, ある, in its classical negation. Compare and contrast to modern past positive ~かった, which is itself ~くありたり.

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    If you really want to break it down into historical components, ~かった is from ~く + ありて + あり. However, this is not so useful for modern speakers to know. :) Colloquially / in modern usage, ~かった can also be analyzed as ~く + あった. Commented Mar 1, 2022 at 22:22

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