哎

āi zhēn méi xiǎng dào

哎！真没想到！

Ah, this is really unexpected!

āi shì nǐ

哎！是你！

Why, it's you!

āi nǐ zěn me néng hē shēng shuǐ ne

哎，你怎么能喝生水呢？

Hey, why are you drinking pond water?

āi xiǎo wáng nǐ chū qù néng gěi wǒ dài zhāng bào zhǐ ma

哎，小王，你出去能给我带张报纸吗？

Oh, Xiao Wang, would you get me a paper while you are out?

āi xiǎo xīn jiǎo xià ya

哎，小心脚下呀！

Oh. Mind your steps!

āi míng tiān zǎo diǎn lái

哎，明天早点来！

Hey, come earlier tomorrow!

āi nǐ zěn me néng zhè me shuō

哎！你怎么能这么说！

Well, how can you say this?

āi zhè zhēn chéng le yī běn hú tu zhàng le

哎，这真成了一本糊涂账了。

Hey, this is really a mess!

āi wǒ dàng shí méi yì shí dào huì yǒu nà me yán zhòng

哎，我当时没意识到会有那么严重！

Oh, I didn't realize it was that serious!