だい冬眠 とうみん ねずみではありませんでした
daitōminnezumidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 大冬眠鼠

1. Was not a hibernating mouse.; Was not a great hibernating mouse.

Past/Perfective
Negative
Polite
Formal Register