Meaning of āi:
āi
唉
Interjection
interjection or grunt of agreement or recognition (e.g. yes, it's me!); to sigh; alas; oh dear
Tā wèn wǒ shì bu shì zuótiān lái de, wǒ shuō le shēng “āi”.
她问我是不是昨天来的，我说了声“唉”。
She asked if I came yesterday, and I replied “yes”.
Tā měi cì xiǎng qǐ guòqù, zǒngshì rěn bù zhù tàn yī shēng āi.
他每次想起过去，总是忍不住叹一声唉。
Every time he remembers the past, he can't help but let out a sigh of 'āi'.
Tā wàngle dài sǎn, ài, xiànzài xiàyǔ le.
她忘了带伞，唉，现在下雨了。
She forgot to bring an umbrella, alas, now it's raining.
Ài, jīntiān zhēn shì máng jí le.
唉，今天真是忙极了。
Oh dear, today has been extremely busy.
