いち人称 にんしょう だい名詞 めいしじゃなかったです
ichininshōdaimei shija nakattadesu

Noun
Desu Copula

The polite, past negative form of 一人称代名詞

1. It wasn't I.; It wasn't me.

Past/Perfective
Negative
Polite
Casual Register
Linguistics