ちょうばえじゃなかったです
蝶蝿じゃなかったです
chōbae ja nakattadesu

Noun
Desu Copula

The polite, past negative form of ちょうばえ

1. Wasn't a butterfly.; Wasn't a moth.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana