我为______向你道歉。

　　I regret to inform you that I am unable to do

　　很遗憾地告诉你，我没法___________.

　　I am so sorry to have put you through so much trouble…

　　很抱歉给你带来这么多麻烦，__________.

　　Invitation

　　The honor of your presence is requested…

　　若你能出席________,我（们）将感到万分荣幸。

　　It's a pleasure for me to invite you to…

　　我很荣幸地邀请你参加__________.

　　We sincerely hope that you make it.

　　我们真诚地希望你能参加。

　　We would be honored to have you there with us…

　　如果您能参加我们的__________,我们将不甚荣幸。

　　I will cover all the expense involved.

　　我将负担所有的费用。

　　Sympathy

　　I can only imagine how difficult this time must be for you, and I want to extend to you my unwavering support.

　　我能想象你所经历的一切，而且，我想告诉你，我会永远支持你。

　　Complain

　　I am writing to express my dissatisfaction with\at…

　　我写这封信是想告诉你们我对________不是很满意。

　　I very much regret to have to inform you that…

　　很遗憾地通知你，__________.

　　I would like to draw the attention of the authorities concerned to the …