沿層 えんそう坑道 こうどうじゃありませんでした
ensōkōdōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 沿層坑道

1. Was not along the layered tunnel.; Was not in the layered tunnel.

Past/Perfective
Negative
Polite
Terminal Form