二十 にじゅう いち だい しゅうではありませんでした
nijū ichidaishūdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 二十一代集

1. Was not the 21st generation gathering.; Was not part of the 21st generation gathering.

Past/Perfective
Negative
Polite
Formal Register