返信 へんしん よう封筒 ふうとうじゃありませんでした
henshin'yō fūtōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 返信用封筒

1. It wasn't a return envelope.; It was not a self-addressed envelope.

Past/Perfective
Negative
Polite
Terminal Form