考研英語寫作投訴信又可稱為抱怨信，其主要目的是表達寫信人對于某一情況的不滿。人們在生活中經常會遇到一些不愉快的事情，比如消費利益受損、正常生活和工作受到干擾等等，有時寫封投訴信不失為一個解決辦法。那么，投訴信應該怎么寫呢？

投訴信通常包括以下幾個方面的內容：說明投訴的原因并表示遺憾；實事求是地闡述問題發生的經過，切忌夸大其詞；指出問題引起的后果；提出批評及處理意見，或敦促對方采取措施，或提出所希望的賠償以及補救方式。

投訴信的寫作策略：說明投訴問題——描述具體情況——期待解決方案。

注意事項：寫投訴信時語氣要冷靜、鄭重、克制，不必過于禮貌。但也要就事論事，不能進行人身攻擊。同時，在描述問題時盡量采用被動句式，使描述更加客觀合理。

投訴信的常見句型又有哪些呢？

投訴信開頭常用句式和套話： 

I am writing to complain about/that…

I am writing to make a complaint about…

I am writing to express my concern/dissatisfaction/disappointment about…

I feel bad/sorry to trouble you but I am afraid I have to make a complaint about…

I am most reluctant to complain, but…

I am writhing to advise you that I find…unsatisfactory.

I wish to draw your attention to the problem/fault…that I bought…

It is with great reluctance that I must inform you that…

投訴信結尾常用句式和套話： 

I trust you will take my complains seriously and…

I will appreciate it very much if you could…

I would be perfectly satisfied if you can kindly…

I understand you will give immediate attention to this matter.

I would like to have this matter settled by the end of…

Frankly speaking, I am not prepared to put up with the situation any more.

I must have you fully understand that without a satisfying solution, I will reserve my right to take legal action.

I would be grateful if you could…

I would appreciate it if you could…