だい よん しゅ郵便 ゆうびん ものじゃありませんでした
daiyon shu yūbimmonojārimasendeshita

Noun
Desu Copula

The polite, past negative form of 第四種郵便物

1. It was not fourth-class mail.; It wasn't fourth-class mail.

Past/Perfective
Negative
Polite
Terminal Form