業界 ぎょうかい精通 せいつう しゃじゃありませんでした
gyōkaiseitsūshaja arimasendeshita

Noun
Desu Copula

The polite, past negative form of 業界精通者

1. Was not an expert.; Was not familiar with the industry.

Past/Perfective
Negative
Polite
Terminal Form
Computing