Dear XXX,
Now let me tell you about my family.There are six people in my family.My grandfather is eighty-six years old.He used to be a history teacher.He always tells me about the old days.My grandmother is very lovely,she likes dancing and singing and she do it well.My father is a teacher too,but he teaches chinese.My mother is a nurse.She is a beautiful woman and she always cooks lots of delicious foods for me.I have a borther.He studys in Bejing.He often helps me with my study.They love me and i love them and we enjoy our life.
Sincerely Yours
XXX
一般的英文信都是顶格的,最后致辞加名字
希望能你有帮助吧