1.i must apologize to you for... （being late/my absence）我必须为… … 向你道歉 。
2.l am terribly sorry for what l have done 我为我做的事感到非常抱歉
3. it is very inconsiderate of me to do... 我 因欠考虑而做…
4. please forgive me. 请你原谅我 。
5.i owe you an apology我向你道歉 。
6.l have to say sorry to you 我 向你道歉。
7.i regret to inform you that l am unable to do…我很遗憾告知您我不能……
8.it is my fault 这是我的过错。
9.i am sure you can understand this 我保证你会理解这件事 。 1o.please
pardon/excuse/forgive me请你原谅我 。
11. please accept my apologies for…once more/again 请再一次接受我为… 的歉意 。
12.i express my regret at being unable to do…对未能做… … ，我表示遗憾 。
13. l will try my best not to make such kind of mistakes again 我将尽量不再犯此类错误。