おはぐろかげろうじゃなかったです
御歯黒蜻蛉じゃなかったです
ohagurokagerōjanakattadesu

Noun
Desu Copula

The polite, past negative form of おはぐろとんぼ

1. Wasn't a black dragonfly.; Wasn't a fancy/refined dragonfly.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana