だけからすじゃありませんでした
岳烏じゃありませんでした
dake karasuja arimasendeshita

Noun
Desu Copula

The polite, past negative form of だけがらす

1. Was not a mountain crow.; Was not a yamabato.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana