火山 かざん円錐 えんすい きゅうではありませんでした
kazan'ensui kyūdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 火山円錐丘

1. It was not a volcanic cone.; It wasn't a volcanic cone.

Past/Perfective
Negative
Polite
Formal Register