返信 へんしん よう封筒 ふうとうじゃなかったです
henshin'yōno fūtōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 返信用の封筒

1. Was not a reply envelope.; Wasn't meant for a reply.

Past/Perfective
Negative
Polite
Casual Register