道歉信道歉信是指因过失或疏忽做错了事，给别人带来了麻烦或损失，发觉后要立即写信给对方赔礼道歉时写的信件。道歉是一种礼貌，道歉信要写得坦率，诚
模板1：过去没有完成的事情 Dear  I am writing this letter to apologize to you for my failing to .  The reason is that . I am sorry that I can‘t finish in time, but is it possible that I make up the loss by ? If so, I will put everything else aside to .  I do hope that you can understand my situation and accept my apology.                           Yours sincerely                      ...