原油 げんゆ流出 りゅうしゅつじゃありませんでした
gen'yuryūshutsujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 原油流出

1. It was not crude oil that flowed out.; It did not flow out as crude oil.

Past/Perfective
Negative
Polite
Terminal Form