動作 どうさ有効 ゆうこう期間 きかんじゃありませんでした
dō sayūkōki kanja arimasendeshita

Noun
Desu Copula

The polite, past negative form of 動作有効期間

1. Was not within the valid operation period.; Was not a valid operation period.

Past/Perfective
Negative
Polite
Terminal Form
Computing