The adjective 綺麗 (meaning "beautiful/clean", JLPT N4) conjugates in the Past Negative Polite form as 綺麗じゃなかったです (kirei janakatta desu). Adjective type: na-adjective.
Context Example
この部屋は綺麗じゃなかったです。
Kono heya wa kirei janakatta desu.
This room was not clean.
What is the Past Negative Polite conjugation of 綺麗 (kirei)?
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