単純 たんじゅん素朴 そぼくではありませんでした
tanjun sobokudewārimasendeshita

Noun
Desu Copula
na-Adjective

The polite, past negative form of 単純素朴

1. Was not simple.; Was not naive.; Was not unsophisticated.

Past/Perfective
Negative
Polite
Formal Register