うすばかげろうじゃありませんでした
薄羽蜉蝣じゃありませんでした
usubakagerōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of うすばかげろう

1. Was not a mayfly.; Was not thin feathers.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana