下層 かそう階級 かいきゅうではありませんでした
ka sō kaikyūdewārimasendeshita

Noun
Desu Copula
no-Adjective

The polite, past negative form of 下層階級

1. Was not of the lower class.; Was not lower class.

Past/Perfective
Negative
Polite
Formal Register