疲れてた

was tired

→ 疲れる
疲れ get tired, become tired + て Te-form (conjunctive form) + た Past tense
verb · informal, past tense Rare #24,358
was tired Colloquial contraction of 疲れていた.
JA: 昨日は仕事で疲れてた。
EN: I was tired from work yesterday.
Conjugation of 疲れる

宿題やって疲れてたんだ。

I was tired from doing my homework.

あの人達、きっと疲れてたんだよ。

They must have been tired.

昨日の夜はすごく疲れてたんだ。

I was really tired last night.

疲れてたから、早く寝たよ。

I was tired, so I went to bed early.

昨日の午後は疲れてたの?

Were you tired yesterday afternoon?

勉強で疲れてたんだよ。

I was tired from studying.

昨夜帰ってきた時は、くたくたに疲れてたんだ。

I was completely exhausted when I got home last night.

昨夜は疲れてたの?

Were you tired last night?

ねえポーラアレックスは以前こんなに疲れてたかしら?

Hey, Paula, was Alex ever this exhausted before?

— グッバイ、レーニン! (2003)