Dear Tim,

　　I am quite sorry that I have to ask a favor of (寻求帮助)you, with the hope that you will be kind to help me.

　　I have been looking forward to applying for the entrance examination for MA candidates for a long time because I want to pursue further studies(进修). Unfortunately I find myself far from the required standard, especially my very poor English. Finally, the personal friendship leads me toapproach(联系) you with the request, whether you can give me someinstructive guidance(启发性的指导). I promise to be a diligent student. If you agree, please call me as soon as you are free, I hope I can visit you twice a week.

　　Thank you very much for your kind help again.

　　                                                                          Yours sincerely,

　                                                                               　Li Ming

　　亲爱的蒂姆：

　　很抱歉我不得不请你帮忙，希望你能好心帮助我。

　　很长时间以来，因为想进一步学习，所以我一直在申请硕士研究生考试。但不幸的是我发现与要求的水平相差很远，特别是英语很弱。最终，个人友谊让我向你提出这样的请求：你是否能给我一些有意义的指导，我会做一个勤奋的学生。如果你同意，请在方便的时候尽快联系我，希望一周能拜访你两次。

　　再次十分感谢你的帮助。