英语作文,大哥大姐帮下忙,很急!

I have a dream since I was young.I want to be a doctor to help patients.When I was young,I was very weak and often fell sick.I went to hospital to see a doctor.He was very helpful and kind.I think that is why I want to be a good doctor in the future.To be a doctor when I grow up,I have to study hard and help my classmates with their homework now.