哎

ài shuí ràng wǒ dàng shí bù bǎ tā dāng huí shì ne

哎，谁让我当时不把它当回事呢！

Oh, I shouldn't have taken it so casually!

ài wǒ bù néng qù le

哎，我不能去了！

Oh, I can't go!

ài wǒ wàng jì gěi qióng dǎ diàn huà le

哎！我忘记给琼打电话了。

Oh! I forgot to phone Jean.

ài gǎi le jiù xíng

哎，改了就行。

Well, it's good that you have corrected your mistake.

ài zǒu ba

哎，走吧！

All right, go!

ài tài hǎo le

哎！太好了！

Oh, good!