貝殻 かいがら じょう だん くちではありませんでした
kaigarajōdan kuchidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 貝殻状断口

1. Was not a shell-like fracture.; Was not a conchoidal fracture.

Past/Perfective
Negative
Polite
Formal Register