题目写“Leave application
To：你上司的名字，职位(manager)
From：你的姓名
Date：May 17th，2010
Subject：Casual Leave of Absence
Dear Mr./Mrs，你上司的姓最好放在此。
There is a very important procein which I have to return to school for graduation thesis defense and other pa-pe-r work before the graduation. so may I please ask for a leave on 20th，21st，24th，27th in May? I hope you will oblige and grant me the requested leave.
Thank you very much for your consideration.
Yours sincerely，
一年365天，总有那么几天会有突发情况，例如生病，那么生病了就要请假，你可以和你的老板说：I'm sick.I wanna take a day off.我生病了，我想假一天。
take a day off请一天假（可以请任何假）但是！take a day off最好不要用在书写中，会显得不正式，在邮件中的正式请假应该用leave
personal leave：事假
sick leave：病假
vacation：休假
annual leave / holidays：年假
marriage leave：婚假
bereavement leave/funeral leave：丧事假
maternity leave：产假
over time：加班
absencen：缺席不在，旷工
Leave application / Personal leave
Dear Mr./Mrs. Jin
I'm writing this letter to request 3 days leave for personal reason (请假原因)，starting from 1st to 3rd in March (日期) . I have to go back to school and attend the graduation ceremony (详细原因) .
Thank you very much for your consideration.
Your sincerely，
Edward