The adjective 元気 (meaning "healthy/energetic", JLPT N4) conjugates in the Past Negative Casual form as 元気じゃなかった (genki janakatta). Adjective type: na-adjective.
Context Example
おじいちゃんは元気じゃなかった。
Ojiichan wa genki janakatta.
Grandfather was not energetic.
What is the Past Negative Casual conjugation of 元気 (genki)?
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