ちりすじゃありませんでした
地栗鼠じゃありませんでした
chirisujārimasendeshita

Noun
Desu Copula

The polite, past negative form of じりす

1. Was not a chipmunk.; Was not a ground squirrel.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana