遊んでた

was playing, were playing

→ 遊ぶ
遊ん to play; have fun + で Te-form (conjunctive) + た Past tense
verb · informal, imperfect tense Uncommon #15,997
was playing, were playing Colloquial contraction of 遊んでいた.
JA: 子供たちは公園で遊んでた。
EN: The children were playing in the park.
Conjugation of 遊ぶ
Indicative imperfect
遊んでた

子どもの頃、あの公園でよく遊んでたな。

I used to play in that park a lot when I was a kid.

俺が子供の頃は道でチョークで遊んでた

When I was a kid, I used to play with chalk on the street.

— ビッグ・シック ぼくたちの大いなる目ざめ (2017)

トムは携帯のゲームで遊んでたよ。

Tom was playing a game on his phone.

私たちが子供の頃は、毎日一緒に遊んでたよね。

When we were kids, we used to play together every day, didn’t we?

子供の頃、よくここで遊んでたなぁ。

I used to play here a lot when I was a kid.

昔はそこで遊んでたよ。

I used to play there.

子供の頃は、よく一人で遊んでたよ。

When I was a kid, I often played by myself.

子供たちなら公園で遊んでたよ。

The kids were playing in the park.

子供の頃、よくあの公園で遊んでたよ。

When I was a kid, I used to play in that park a lot.

赤ん坊は猫の尾でおもしろく遊んでた。

The baby was having fun playing with the cat’s tail.

この公園でよく遊んでたよ。

I used to play in this park a lot.

よくそこで遊んでたよ。

I used to play there a lot.

俺とジミーとボイルってガキが家の前で遊んでたんだ

Jimmy, a kid named Boyle, and I were playing in front of the house.

— ミスティック・リバー (2003)