学級 がっきゅう崩壊 ほうかいじゃなかったです
gakkyūhōkaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 学級崩壊

1. Wasn't class disruption.; Wasn't a class collapse.

Past/Perfective
Negative
Polite
Casual Register