潮力 ちょうりょく発電 はつでんじゃなかったです
chōryokuhatsudenjanakattadesu

Noun
Desu Copula

The polite, past negative form of 潮力発電

1. Tidal power generation wasn't.; It wasn't tidal power generation.

Past/Perfective
Negative
Polite
Casual Register