くまのこかいじゃなかったです
熊の子貝じゃなかったです
kumano kokaijanakattadesu

Noun
Desu Copula

The polite, past negative form of くまのこがい

1. Wasn't a bear cub.; Wasn't a young bear.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana