英语向别人请假怎么说

To ask for leave in English, you can say something like:
"Hi, I was wondering if I could request some time off. I have a personal matter that I need to attend to and I'm hoping to take a few days off next week. Is that possible?"
Or you could say:
"Hello, I'm writing to request a leave of absence. I have a family emergency that requires my attention and I will need to be out of the office for the next week. Thank you for considering my request."
In either case, it's important to be polite and give a clear reason for your request. It's also a good idea to provide advance notice if possible, so that your employer has time to make arrangements for your absence.