我想向老师请一天假,用英语怎么表达比较好?

问题描述:

我想向老师请一天假,用英语怎么表达比较好?
中文大意:我明天有重要的事,所以想请一天的假!

I'm so sorry to ask for a day leave tomorrow because of important personnal business. I'm sure to be back on time and make up for the missed class. Thank you so much!