火災 かさい積雲 せきうんじゃありませんでした
kasaisekiunjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 火災積雲

1. It was not a cumulonimbus cloud causing the fire.; It wasn't a fire cumulus cloud.

Past/Perfective
Negative
Polite
Terminal Form