审：人称：第一人称时态：一般过去时体裁：道歉信
列：failed to attend your birthday party the day before yesterdaythe final examwas occupied preparing for the examforget the appointmenthave a get- togethermake up for my careless mistakeaccept my sincere apologies
润：定语从句：as I had promised时间状语： On receiving your invitation, I felt extremely happy and excited. so...that...: I was so occupied preparing for the exam that I forgot the appointment. so that: Could we find a suitable time to have a get- together so that I can make up for my careless mistake.主语从句：It is much to my regret that I missed the chance.
范文： Happy birthday to you. I’m sorry that I failed to attend your birthday party the day before yesterday as I had promised. On receiving your invitation, I felt extremely happy and excited. Unfortunately, with the final exam around the corner, I was so occupied preparing for the exam that I forgot the appointment. I can imagine how disappointed you were when I didn’t turn up. Anyway, the exam over, could we find a suitable time to have a get- together so that I can make up for my careless mistake? It is much to my regret that I missed the chance. Once again, please accept my sincere apologies!
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