很 + 抱歉
The word 抱歉 (bàoqiàn) means "to be sorry" or "to feel apologetic." It is a polite and somewhat formal way to express an apology. You can use 很抱歉 to mean "I'm very sorry," which is common in both spoken and written Chinese.
很抱歉,让你久等了。
Hěn bàoqiàn, ràng nǐ jiǔ děng le.
I'm very sorry for making you wait so long.
我感到非常抱歉,这件事是我的错。
Wǒ gǎndào fēicháng bàoqiàn, zhè jiàn shì shì wǒ de cuò.
I feel very sorry; this was my fault.
抱歉打扰你,我想问个问题。
Bàoqiàn dǎrǎo nǐ, wǒ xiǎng wèn ge wèntí.
Sorry to bother you; I'd like to ask a question.