英语请假条怎么写

Dear teacher
Due to sickness(reason), i have to take one day off to see a doctor.Please approve. Thank you.
Student....

文头：Ask for Sick/Business leave (请病假/事假条)
批准机构或人：（比如）To XXt office (XX办公室)
称呼：Dear Sir / Dear XX
正文：(见下例)
落款：Yours faithfully XX
日期：Sep,X,2009
例一、病假条
I am awfuully sorry that I can not come to the office today.Enclosed please find a certificate form the doctore who said I must keep0 the bed.It may possible be a few days before I am able to resume my duty.
I trust my abesence will not cause you any serious inconvenience.
Yours faithfully
XX
Sep,X,2009
例二、事假条
I beg to apply for some days' leave of absence from (某日) to (某日) instant,in order to (办某事).
To support my application,I herewith submit a (某证明).
I should be very much obliged if you will grant my application.As regards the (工作或学习事务) to be miss during my abxence,I will do my best to make them up as soon as I get back from leave.
Yours faithfully
XX
Sep,X,2009