下層 かそう階級 かいきゅうじゃなかったです
ka sō kaikyūjanakattadesu

Noun
Desu Copula
no-Adjective

The polite, past negative form of 下層階級

1. Wasn't lower class.; Wasn't of the lower class.

Past/Perfective
Negative
Polite
Casual Register