Common Meanings
1
āi唉
An interjection used as a response, often indicating a sigh, or to acknowledge someone calling.
唉，你来了！快进来吧。
Oh, you're here! Come in quickly.
An interjection expressing a sigh, often indicating regret, sadness, or resignation.
唉，他又迟到了，真让人头疼。
Sigh, he's late again, it's such a headache.
2
ài唉
An interjection expressing sadness, regret, or disappointment.
唉，真没想到会是这样的结果。
Alas, I really didn't expect such a result.