你的室友的腿摔断了，你得陪他去医院所以今天不能去上课。给你的老师写一张请假条（英文的）急！

note for leave

Dear Mr.**/Ms.**（老师名字）
This is ***(你的名字）， I am so sorry that I can not go to school today.Since my room mate***(室友）has broken his leg and I have to take him to hospital for operation. It's serious and I think it would take one day's time. So I am here to ask for a leave and I will get back to class as soon as possible.
Thank you very much.
***
20/11/2009

Dear Jim(外教的名字)：

you won't see me in your class today because I have to go to hospital with my roommate. thank you for your understanding.

yours,

Tom (你的名字)
11、20、2009

Dear XX

I have to ask for a leave for today's class because my roommate broke his leg yesterday, I need to take care of him at hospital. Thanks for your understanding.

yours,
XXX
11/20/2009

Dear Mr.**/Ms.**（老师名字）
Hello!
My roommate leg, I must accompany him to go to the hospital, so can't come today