好気 こうき せい細菌 さいきんではありませんでした
kōkiseisa ikindewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 好気性細菌

1. Was not an aerobic bacterium.; Was not facultative anaerobic.

Past/Perfective
Negative
Polite
Formal Register