唉

ài wǒ ná tā méi bàn fǎ

唉，我拿他没办法！

Oh well, I really don't know what to do with him.

ài zǎo zhī dào rú cǐ wǒ jiù bù qù le

唉，早知道如此，我就不去了。

Alas, if I'd known this beforehand, I would not have gone there.

ài zhè duō diū liǎn a

唉，这多丢脸啊！

Oh, what a shame!