単式 たんしき学級 がっきゅうじゃありませんでした
tanshikigakkyūjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 単式学級

1. It was not a single-class lesson.; It wasn't a one-form class.

Past/Perfective
Negative
Polite
Terminal Form