毕业请假是在学生毕业时需要请假的情况下，向学校或老师提出的一种申请。在全球化与跨国交流的今天，英语作为一种国际语言，已成为重要的交流工具之一。因此，用英文表达毕业请假条也是非常必要的。

首先，毕业请假条的开头应该写明申请人的姓名、学号和班级等基本信息。接着，要清楚地说明请假时间和原因。例如：

Dear Sir/Madam,

I am writing to request a leave of absence from school from [date] to [date]. The reason for my absence is that I will be attending my graduation ceremony during this period.

As you can see, I will be participating in an important event that marks the completion of my studies at this institution. I would like to request your understanding and approval for my absence during this time.

Thank you for your attention to this matter.

Sincerely,

[your name]

最后，毕业请假条需要表达申请人的感谢和尊重，并在结尾处签上自己的名字。

总之，写一份用英文表达的毕业请假条并不难，只需简明扼要地表达清楚自己的请假原因，以及表达对学校和老师的感谢与尊重，即可得到他们的理解和支持。