こんごうあなごでわありませんでした
金剛穴子ではありませんでした
kongōanagodewārimasendeshita

Noun
Desu Copula

The polite, past negative form of こんごうあなご

1. Was not a diamond-drill core.; Was not a hard/strong child.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana