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ついてた

was on, had been switched on, was attached to, was stuck to, had an idea

→ 付く
verb · informal, past tense Rare #42,788
was on, had been switched on A past form of ついている, often used for lights and other devices.
JA: 部屋の電気がついてた。
EN: The room light was on.
was attached to, was stuck to A past form of ついている.
JA: 服に紙がついてた。
EN: A piece of paper was stuck to my clothes.
had an idea, had figured it out Used in expressions such as 察しがつく (to figure something out).
JA: 何があったのか、だいたい察しがついてた。
EN: I had mostly figured out what had happened.
was lucky Informal; often used on its own to mean that things went well.
JA: 今日はついてた。
EN: I was lucky today.
Conjugation of 付く
Indicative past
ついたがついたついてた

ついてたんだと思う。

I think it was attached.

部屋に電気はついてたよ。

The light was on in the room.

何がついてた？

What came with it?

— 罪人たち (2025)