あたまくろけいかんけりじゃありませんでした
頭黒鶏冠鳧じゃありませんでした
atamakurokeikankerija arimasendeshita

Noun
Desu Copula

The polite, past negative form of ずぐろとさかげり

1. Was not a black-crowned chicken.; Was not a black-crowned duck.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana