Next test

I've been studying a lot of english this year because I always committed stupid mistakes and I want to stop with that and start to improve my grammar. This is one of the reasons of why I prefer to study for english classes than other subjects.
I think I'm not prepared for the test; however, I've been working on my mistakes and trying to study more than I usually do. I know that I need to believe in myself because when I do an exercise I'm always with the doubt if it is good or not, so that’s why I need to practice more. On the other hand, I know that I have the abilities to do a good job, that's why I want to do the effort and study a little bit more than I usually do.