くろさいだいとかげじゃなかったです
黒細大蜥蜴じゃなかったです
kurosaidaitokagejanakattadesu

Noun
Desu Copula

The polite, past negative form of くろほそおおとかげ

1. Was not a black, thin, large lizard.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana