Why is this happening everytime??

i m really smart guy i got all A+ in geometry, us hist,worldhist,spanish 1,and construction. what i dont get is why i always fail my english tests on fridays whatever we learn in the week. i study so much for them i dont know why i fail tests. i somhow manage to get B in the cl but i want A. can somone tell me why this happens or better study routines. i m really smart guy but i always hated english when it comes to testing.what can i do plzzzzzz help i rally need A+ in all i m in junior year. ( if u think taht i m typing bad tahts y maybeits not that bec tahts how i type here lol) so any suggestions????