道歉行为： I’m writing to show my apology for…/ I would like to express my apologies for not being able to…/I’m sorry to say that I’ve not finished reading it through, and have to keep it until next Sunday. / Excuse me for my delaying in turning in my assignment.
道歉理由：I had a minor accident./ I had a minor operation.
弥补纠正及其承诺：I am sure I can make up the loss by…/ I promise it will never happen again. / It would be very kind(considerate) of you to give me another chance to…( to give me another two days
进一步致歉： Many apologies. / Do please forgive me.
I am writing to you to apologize for the abrupt way I departed just after the exams finished. It was terribly rude of me to have left without saying good-bye to you. The fact is that I was so excited when I learned I had passed the exams with high marks that I couldn’t wait to get home and tell my parents. I am sure you will understand my feelings. Please accept my sincere apology, and with you a really happy holiday.
I am sorry I missed seeing you yesterday. I know that you must have been disappointed. I also feel worried and anxious in my heart. The fact is that my manager at the last moment asked me to prepare an urgent plan while I could not get to a phone to call you and yesterday I have worked late until about 8:30 p. m. I am terribly sorry. However, I would like to ask you out this weekend to make up for yesterday. Please give me a chance and I am waiting for your reply.
I imagine that you must be enjoying your birthday party today. I write this letter to offer my heartiest congratulations and best wishes for many returns of the day. It is a great pity that I cannot be with you. But remember I am thinking of you all the time. I hope that all your years to come will be twice as happy and as merry as those past.Please accept the small gift I am sending you as a token of my best wishes for your happy birthday.