I am quite sorry that I have to ask a favor of (尋求幫助)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(進修). Unfortunately I find myself far from the required standard, especially my very poor English.
Finally, the personal friendship leads me to approach(聯系) you with the request, whether you can give me some instructive guidance(啟發性的指導). 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.