Only reply is to work hard.
Give more time to this subject.
Read English story books.
Learn grammar carefully.
Listen English news.
Write 2 to 3pages daily at home. Try to write essay in English & show to you father or mother to check. Find out your mistakes & write every mistake 10 times again.
Learn spellings by heart.
Pray 5 times & read Quran daily with translation.
It will increase your memory & guide you to the right path as well.