Step-by-step explanation:
Dear Peter, I'm writing a letter to inform you that I just had an accident yesterday. Last night, I tripped and fell while going down the stairs. As I was in a lot of pain, my grandmother took me to a nearby clinic. The doctor who examined me said that I had sprained my ankle. He gave me some medicine and painkillers to cope with the pain. The doctor also advised me to rest for a few days.
But I'm still unable to walk properly as it is so painful. My ankle is also badly swollen. So I will not be attending school for a few days and my classmates have offered to help me collect homework and keep me informed about the homework that I need to complete. That's all. Bye