帮我看下我的英语短文有没写错

如果写给唐老师一个人，第三句就应该是my teacher.第七句话开头直接用tell多为祈使句用法，如果是我，我会说，Next I would tell something about myself to you.第十二句，I和learned之间加had。倒数第二句， best前加the.

I could understand what Miss Tang said completely.Not only Miss Tang but also I
worried(worry) about our study.Thank you ,my teachers. You often give us some help both in our study and everyday life.You always encourage and support us.Thank you very very much!
Tell something about me to you.Why did my study become poorer and poorer this term? I began to think about this problem.I found the answer at last.I didn't study hard this term.I didn't go over what I (had) learned in time.Sometimes I even didn't listen to classes very carefully.I spent too much time playing computer too.
No pains, no gains. We must try our best to study,my classmates. Mid-term exam is coming.Come on!Do well in the exam.Show how excellent class five is!I believe my(our) class is one of best classes in Nanwu Middle School.Remember