浚渫 しゅんせつ作業 さぎょうではありませんでした
shunsetsusagyōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 浚渫作業

1. Was not dredging work.; Was not a dredging operation.

Past/Perfective
Negative
Polite
Formal Register