茶翅 ちゃばねゴキブリではありませんでした
chabanegokiburidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 茶翅ゴキブリ

1. Was not a cockroach.; Was not tea wings.

Past/Perfective
Negative
Polite
Formal Register