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嘘をついてた

was lying

→ 嘘
phrase Rare #41,449
was lying A casual contraction of 嘘をついていた, meaning someone was lying or had been lying.
JA: 彼はずっと嘘をついてた。
EN: He had been lying the whole time.

あいつら嘘をついてたのか？

Were they lying?

今まで嘘をついてたんだな

So you've been lying to me all this time.

— オープン・ユア・アイズ (1997)

女房にはしょっちゅう嘘をついてた。

I was always lying to my wife.

二人にはずっと嘘をついてた

I've been lying to both of them all along.

— グッバイ、レーニン！ (2003)