おすましじゃありませんでした
お澄ましじゃありませんでした
osumashija arimasendeshita

Noun
Desu Copula

The polite, past negative form of おすまし

1. Was not being modest.; Was not acting refined.; Was not pretending to be innocent.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana