唉 + Clause / 唉
唉 (āi) is an interjection used to express a sigh of sadness, regret, disappointment, or resignation. It is typically placed at the beginning of a sentence or used as a standalone utterance to convey emotional weariness.
唉,早知道我就不去了。
Āi, zǎo zhīdào wǒ jiù bú qù le.
Sigh, if I had known, I wouldn't have gone.
唉,这次考试又没考好。
Āi, zhè cì kǎoshì yòu méi kǎo hǎo.
Sigh, I did poorly on the exam again.
唉,时间过得真快啊。
Āi, shíjiān guò de zhēn kuài a.
Sigh, time really flies.