あおそこひでわありませんでした
青底翳ではありませんでした
a osokohidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of あおそこひ

1. Was not a blue-backed thrush.; Was not a dark-colored bird.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana