くろばえでわありませんでした
黒蠅ではありませんでした
kuroba e dewārimasendeshita

Noun
Desu Copula

The polite, past negative form of くろばえ

1. Was not a black fly.; Was not a blowfly.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana