Question

Write a letter to your father, explaining why you could not get good marks in English.
OR
Write an application to the principal of your college requesting him to give you a certificate regarding your conduct and character.

Answer 1

(First write the whole structure of letters) then,

SORRY Father ,I didn't get good marks in English because I didn't pay attention when the teacher is giving the lecture and I didn't learn
anything as I play outside and I have no time to learn.My mother also forced me to learn but I also didn't listen her.Sorry for my laziness and I promise you that I get good and best marks next time.
I hope you will forgive me.

(According to the end structure of letters)