Dear Sir/Mr. Prometheus,

　　I was a student at your college, enrolled in Philosophy Department.

　　I am a at your

　　I am a at your college, enrolled in the course.

　　My name is , I am .

　　2、问候收信人(假如他/她是你的朋友)

　　Dear Prometheus,

　　Hello/Hi. How are you? / I hope everything is fine. / How are things going with you?

　　How are you getting on in/getting along with?

　　3、解释写信的原因

　　(1)致谢：

　　I deeply appreciate your courtesy and I hope to reciprocate your favor when the opportunity arises.

　　I am greatly indebted to you for you have gone to on my behalf.

　　Thank you for your letter about studying in Canada.

　　I am writing to you to express my heartfelt gratitude.

　　I am writing to tell you how grateful I am for.

　　I would like to thank you most sincerely for.

　　(2)抱怨：

　　I am writing to complain about the poor service at your dining-room.

　　I am writing to express my dissatisfaction with/at

　　I wish to make a complaint about.

　　I am writing to draw your attention to.

　　I am afraid I have got a complaint about.

　　(3) 致歉：

　　I would be grateful if you would be so kind as to provide me with certain essential information regarding the following aspects.

　　I am writing to you because I am unable to.

　　I an terribly sorry that.

　　I would like to express my apologies for not being able to.

　　(4)询问：

　　I would like to obtain/request/seek/inquire about some information about

　　I am writing to ask if you can do me a favor.

　　I would like some detailed information on/about

　　Dear Sir/Mr. Prometheus,

　　I was a student at your college, enrolled in Philosophy Department.

　　I am a at your

　　I am a at your college, enrolled in the course.

　　My name is , I am .

　　2、问候收信人(假如他/她是你的朋友)

　　Dear Prometheus,

　　Hello/Hi. How are you? / I hope everything is fine. / How are things going with you?

　　How are you getting on in/getting along with?

　　3、解释写信的原因

　　(1)致谢：

　　I deeply appreciate your courtesy and I hope to reciprocate your favor when the opportunity arises.

　　I am greatly indebted to you for you have gone to on my behalf.

　　Thank you for your letter about studying in Canada.

　　I am writing to you to express my heartfelt gratitude.

　　I am writing to tell you how grateful I am for.

　　I would like to thank you most sincerely for.

　　(2)抱怨：

　　I am writing to complain about the poor service at your dining-room.

　　I am writing to express my dissatisfaction with/at

　　I wish to make a complaint about.

　　I am writing to draw your attention to.

　　I am afraid I have got a complaint about.

　　(3) 致歉：

　　I would be grateful if you would be so kind as to provide me with certain essential information regarding the following aspects.

　　I am writing to you because I am unable to.

　　I an terribly sorry that.

　　I would like to express my apologies for not being able to.

　　(4)询问：

　　I would like to obtain/request/seek/inquire about some information about

　　I am writing to ask if you can do me a favor.

　　I would like some detailed information on/about