我很抱歉，我迟到了。

Wǒ hěn bàoqiàn, wǒ chídào le.

I'm really sorry! I'm late!

抱歉打扰你了。

Bàoqiàn dǎrǎo nǐ le.

Sorry for disturbing you.

抱歉让你久等了。

Bàoqiàn ràng nǐ jiǔděng le.

Sorry for making you wait a long time.