魏晋 ぎしん南北朝 なんぼくちょう時代 じだいじゃなかったです
gishinnambokuchōjidaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 魏晋南北朝時代

1. It wasn't the Wei, Jin, Southern and Northern Dynasties period.

Past/Perfective
Negative
Polite
Casual Register