コーヒー牛乳 ぎゅうにゅうじゃなかったです
kōhiigyūnyūjanakattadesu

Noun
Desu Copula

The polite, past negative form of コーヒー牛乳

1. It wasn't milk coffee.; It wasn't coffee milk.

Past/Perfective
Negative
Polite
Casual Register