Dear MIss Zhang,
I'm writing to you tell you that I can not have the English class this Saturday.I felt sorry about this.
When my mother went to work by bike the day before yesterday,she was hurt her left hand and left foot by accident,So my mother need to go to see the doctor this Saturday and I will go with her that I can't have the English lesson.
In fact,I like the English lesson very much.It is helpful for me to my English study .So I don't want to have the lesson on this Sunday instead.Does Miss zhang have time to improve my English.
Best regards!
Yours respectfully,
Li Wei