道歉信

　　Dear…,

　　I am terribly sorry that I am unable to _____.It is mainly because atthat time I will be full occupied by _____, which is quite out of myexpectation. Therefore I am forced to adjust my schedule and cannot make(my presence on )/(me to)

　　十分难过我不能....因为在那时我要.....(比如照顾妹妹--by taking care ofmy sister),这完全超出我的预期。因此，我被迫去改变的日程以及不能出现在/不能去)。

　　I sincerely hope that you will enjoy a good time. By the way. can wehave dinner together some time next week? I hope to see you soon.I am reallysorry again and I trust that you will understand.

　　我真诚希望你能玩的开心，顺便问下，下个星期的某一夭我们可以一起吃晚餐么?我希望快些见到你。我真的很抱歉同时也相信你能理解我。