I am writing to inform（告知，代替tell）you that I find…unsatisfactory…
I am writing to express/ air dissatisfaction/ disappointment/ concern regarding …
I hope you will take steps to rectify（纠正、改善，代替improve） this situation soon.
I believe you will take my complaints seriously. I would ask you to give back my money, or I would file my complaint（投诉） to the authorities concerned（相关部门）.
To solve this problem/surmount this difficulty/improve the situation/crack this hard nut（解决问题）, I hope to draw the attention of the authorities concerned.
Dear Mr. President,
My name is Li Ming, a junior of the Civil Engineering School. I venture （冒昧）to write a letter to you about the canteen service （食堂服务） on campus which has given rise to a lot of complaints among students.
The focus of the complaint is the poor quality of the food. The vegetables are so overcooked as to lose their nutrients. The price of the food is surprisingly high. Besides , the attitude of the service staff to the students is not hospitable （热情）at all.
All in all, there is still much room for improvement as far as the canteen service is concerned. I do hope we will not suffer for another year. Thank you for your kind consideration.
I would appreciate very much if you can provide me with more details about…
I have learned from…that you will…I just want to know specifically about…
I am writing to see if it is possible for you to provide me with information regarding/concerning…
Would you please send me all the information and the forms as soon as possible? Thank you very much.
I would be much obliged（感激）if you let me know the procedures I have to go through.
I am expecting your early reply/ your immediate response.
Your prompt attention to this letter would be highly appreciated.
I am looking forward to hearing from you.
Thank you for your consideration.
Dear Sir or Madam,
I am a Chinese student who wishes to pursue further study at your university next semester. It would be highly appreciated if you would provide me with some essential information .
First, how much is the tuition fee (学费）? Though I intend to be self-supporting （自费）, I would be interested to know if there is any scholarship available for international students. Second, I wonder what qualifications （资格） I need to follow a course at your university. Now I have got a master degree in Tsinghua University, is it enough? Third, as regards to （关于） accommodations, is it possible for me to have a single room?
I am looking forward to your reply, and to attending your esteemed institution （贵校）.
Could you please…?
Could you possibly…?
Would it be possible to…?
I would be grateful if you could…?
Would you mind doing…?
I wonder if you could spare some time to help me…
Thank you for your attention to this matter.
I look forward to prompt response.
Dear Prof. Smith,
I am a senior in the Computer Science Department of Tsinghua University. Now I am writing my graduation thesis and in urgent need of some reference materials （相关信息）so that I write to you for help.
The material on the application of computer among university students in America is what I need most. Most importantly, the relevant statistics and reports should cover the past two decades. And all the materials must be publications of national level.
The material which I ask you for will decide the failure or success of my graduation thesis. I have failed to find relevant up-to-date materials in China. So your help would be much appreciated and I am looking forward to your reply.
I am writing to you to recommend…for…
I take great pleasure in recommending to you … as …
I would like to present… for your consideration in your search for…
With reference to your requirements（要求）, I shall, without reservation（毫无保留）, recommend…as an ideal candidate.
I am confident/ convinced that… I strongly recommend him to you with no reservation.
Therefore, I do not hesitate to recommend her as an ideal candidate for the post you advertised.
Therefore, I do not hesitate to recommend … as the right person for your consideration.
Dear Prof. Smith,
I am writing to recommend to you Miss Liu Ming who wants to pursue her graduate study for the Master’s Degree under your supervision（监督、管理）.
Miss Liu Ming was one of my classmates in Tianjin University. She was an excellent student in our university as can be seen from her straight A grades on all subjects. After graduation she worked in Tianyi Biological Company for three years, which considerably added to her practical experience（实践经验）.
I think with her intelligence, diligence and rich experience, Miss Liu Ming has great potential in the field of pharmacology both theoretically and practically. Therefore, I recommend her to you with no reservations（毫无保留）.
On behalf of…, I have the honor to invite you to…
It is with the great pleasure that I write to cordially invite you to…
It gives me the greatest pleasure to invite you to…
We should be very grateful if you could…
There will be a dinner party to be held at the Beijing Hotel on Sunday, October 10th, at eight o’clock. Will you and Mrs. Smith come and join us?
I hope that you have no previous engagement and can join us for the English Evening at 7:00 p.m. on February 1st.
We are looking forward to seeing you.
I do hope that you will be able to come.
We should be very pleased if you could honor us with your company.
Dear Mr. Williams,
I am writing on behalf of（代表） the English Department to invite you to give a lecture in our college.
We know that you are an expert on American literature. As English majors, our students would like to know something about American literature. We would be very grateful（感激、感谢） if you could give a talk on “Contemporary American Literature” to students of the English Department on Saturday, June 4. If this subject does not suit（适合） you, any other similar topic would be welcomed as well.
We have already had several very interesting talks from some distinguished（尊贵的，知名的） visitors from various countries and we look forward early to the opportunity to benefit from your experience and wisdom.
I warmly appreciate your hospitality（款待）.
I am writing to express my thanks for …
I am writing to extend my sincere/hearty gratitude/appreciation（真诚的感谢）for …说明事由
Thank you very much for the gift you sent me. It’s one of the most wonderful gifts I got on my birthday.
I am writing this letter to thank you for your warm hospitality accorded to me and my delegation during our recent visit to your beautiful country. I would also like to thank you for your interesting discussion with me which I have found very informative and useful.
Again, I would like to express my warm thanks to you! Please accept my gratitude.
Thanks again and I hope that I will have the opportunity to return/repay your kindness.
I am writing to thank you for looking after me after that unfortunate accident the other day, when I was knocked off my bike by a taxi. But for your assistance, I fear that the consequence might have been much more serious.
The doctor says that my broken leg is healing well, and that I would be able to stand up again in a week’s time. In addition, the taxi company has agreed to pay my hospital bills.
Anyway, everyone agrees that it was your quick-witted response in that emergence that has led to this satisfactory outcome （满意的结果）. I feel I owe you so much, so please accept my most sincere thanks.