新东方考研英语必背500句
第390句
i am writing to you to complain about...
译文：我写这封信是为了投诉…
点睛：本句型是典型的投诉信件的开头句型。本句型中．complain about sth.是固定搭配，表示“抱怨某事物”，因此，about不能替换为其他介词。
句型拓展
*i am writing to express my dissatisfaction with your service．
我写这封信是想表达我对你们的服务的不满。
*l beg to call your attention to the fact that your service is very dissatisfactory.
我想提醒你们注意，你们的服务非常令人不满。
*i wish to refer you to an incident which occurred last friday, calling for some remedial action.
我想告诉你，上周五发生的事急需采取补救措施。
*i very much regret to have to inform you your service is very dissatisfactory.
很抱欺地告诉你，你们的服务非常令人不满。
*i am totally disappointed to find that your service is very dissatisfactory.
你们的服务非常令人不满，我很失望。