硝酸 しょうさん きんじゃありませんでした
ashōsankinjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 亜硝酸菌

1. Was not a nitrite-reducing bacterium.; Was not a denitrifying bacterium.

Past/Perfective
Negative
Polite
Terminal Form