先祖 せんぞ構造 こうぞう たいじゃありませんでした
senzokōzō taija arimasendeshita

Noun
Desu Copula

The polite, past negative form of 先祖構造体

1. Was not an ancestral structure.; Was not a primordial form.

Past/Perfective
Negative
Polite
Terminal Form
Computing