曾经 vs 已经

已经 = "already" — done as of now (已经做完了); 曾经 = "once" — an experience that is over (曾经住过的房子).

曾经曾經

céngjīng ㄘㄥˊ ㄐㄧㄥ

once; already; previously

你曾经听过英语广播节目吗?

Do you ever listen to English programs on the air?

已经已經

yǐjīng ㄧˇ ㄐㄧㄥ

already

我已经做完了。

I've already finished.

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