閉まってた

was closed

→ 閉まる
閉まっ Past/te-form stem of intransitive 閉まる + て Te-form (conjunctive form) + た Past tense
verb · informal, past tense Rare #29,571
was closed Colloquial contraction of 閉まっていた.
JA: 店はもう閉まってた。
EN: The shop was already closed.
Conjugation of 閉まる
Indicative past
閉まってた

タイラーのドアが閉まってた

Tyler's door was closed.

— ファイト・クラブ (1999)

ドアが閉まってたのは初めてだ

It was the first time I'd ever seen the door closed.

— ファイト・クラブ (1999)

銀行は閉まってた?

Was the bank closed?

窓は閉まってた?

Was the window closed?

折角ここまで歩いてきたのに、お店閉まってた。

Even though I walked all the way here, the store was closed.

ドアは閉まってた?

Was the door closed?

学校が閉まってた

The school was closed.

— ほんとうのピノッキオ (2019)