耐火 たいか建築 けんちく ぶつではありませんでした
taikakenchikubutsudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 耐火建築物

1. Was not a fire-resistant building.; Was not a fireproof structure.

Past/Perfective
Negative
Polite
Formal Register