かわず 現象 げんしょうじゃありませんでした
ka wazuka genshōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 蛙化現象

1. It wasn't the frogification phenomenon.; It wasn't a case of frogification.

Past/Perfective
Negative
Polite
Terminal Form