曾

once

(refers to something that happened previously)

already

at some time in the past

before

曾[céng]

-（表示有过某些行为或情况;曾经）(usedtoindicatepastactionorstate)once;formerly;sometimeago:
Imetheronceseveralyearsago.几年前我曾见过她一面。
Formanyyearshehadlivedbeyondthesea(s).他曾旅居海外多年。

他在结婚之前曾向四个姑娘求过婚。
He wooed four girls before finally marrying one.

英联邦在第一次世界大战前曾是一个强大的帝国。
The United Kingdom was a mighty empire before World War I.

我们曾经住在伦敦。
Once we lived in London.

火蜥蜴曾被认为能生活于火中。
Salamanders once were thought to be capable of living in fire.

撒克逊人早期曾定居英格兰。
The Saxon once settled in England in early times.

她曾经爱过我，但现在已成往事。
She loved me once, but that's all ancient history now.

我曾到过那，不想再去了。
I've been there already and don't want to go again.

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