つくばねじゃありませんでした
衝羽根じゃありませんでした
tsuku banejārimasendeshita

Noun
Desu Copula

The polite, past negative form of つくばね

1. Was not a feathering/winging.; Was not equipped with wings.; Was not a winged creature.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana