用英语写一篇请假条

Dear teacher
I caught a cold and am not feeling well now. The doctor suggested me to stay in bed for at least a day and night, so I can't go to school today. Hopefully, I will get well soon.
jack

Dear Sir,
I am sorry that I can't come to school tomorrow. I have something really important to do. Hope to get your understand.

Your student,xxx.
xx.xx.xx

i feel so sorry for i can't come to school. i got fever yesterday, and i felt it much worse this morning, even can't get up, the doctor suggested me have a good rest, so i have to absent to the class

Dear Sir;
I am going to ** from August 1 to 3. Please grant my leave of absence for the above days.
Many thanks.

XXXXX