学級 がっきゅう崩壊 ほうかいではありませんでした
gakkyūhōkaidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 学級崩壊

1. It was not a class collapse.; It wasn't a classroom breakdown.

Past/Perfective
Negative
Polite
Formal Register