改良 かいりょう半紙 ばんしじゃありませんでした
kairyōbanshijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 改良半紙

1. It was not improved half-size paper.; It wasn't half-size paper that was improved.

Past/Perfective
Negative
Polite
Terminal Form