春秋 しゅんじゅう戦国 せんごくではありませんでした
shunjūsengokudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 春秋戦国

1. Was not the Spring and Autumn and Warring States period.

Past/Perfective
Negative
Polite
Formal Register