改良 かいりょう半紙 ばんしではありませんでした
kairyōbanshidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 改良半紙

1. Was not improved half-size paper.; Was not a better/improved half-size paper.

Past/Perfective
Negative
Polite
Formal Register