1. I am writing to ask if it is possible that I could do/finish/submit...... until....(时间)。不直接说明“推迟”,只表示能在什么时间完成(间接表示推迟)。2. I am writing to ask if it is possible that I could postpone ....(直接说出要推迟,如一楼所说~)ps 我个人常用 “i am writing to ask if it is possible that……",觉得比较礼貌正式。
dear prof. **,i am so sorry for not being able to finish my thesis because of my disease, and i hope you could allow me to postpone it for several days.many thanks.