求这篇英语文章的修改意见。

A true friend

I have a best friend called Frank. He is polite and helpful.He is also good at maths.Frank studies much harder than other students in my class.But my study isn't good enough, I often can't pass the exams. I feel ashamed of it

last sunday , We had a surprise Maths test. The result was that I got a low mark.It made me very ashamed.Frank knew my situation,He decided to help me with my maths. we studied together.No matter how difficult the problem was,Frank always was smiled to face it. In the final examinaton, I got a good mark.we were really happy.

Frank is my true friend. We have many unforgotten experiences.

I think that fiend in need is friend indeed.

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A true friend

I have a best friend called Frank. He is polite and helpful.He is also good at maths.Frank studies much harder than other students in my class. However，my study are not good enough。I often can't pass the exams, so i feel ashamed of it 。

Last sunday We had a unexpected Maths test. I have got a low mark. This made me feel very ashamed. Then, Frank knew my situation and decided to help me with my maths. Therefore we studied together from then on. No matter how difficult the problem was,Frank always keep smiling and overcome it . In the final examinaton, I got a good mark.we were really happy.

Frank is my true friend. We have many unforgotten experiences.

I think that fiend in need is friend indeed.

A true friend

I have a best friend called Frank. He is polite and helpful.He is （also） good at maths.Frank studies much harder than other students in my class.But （my study isn't good enough）I am not good enough for lessons, (加入）and I often （can't pass the exams）fail to pass the exams. I feel ashamed of it.

last sunday , We had a (surprise Maths test) math quiz. (The result was that I got a low mark) As a result, I did not pass the exam.It made me very ashamed.Frank knew my situation,He decided to help me with my maths. we studied together.No matter how difficult the problem was,Frank always was smiled to face it. In the final examinaton, I got a good mark.we were really happy.

Frank is my true friend. We have many unforgotten experiences.

I think that (加上）a friend in need is a friend indeed.

数学应是math, the exams应去掉the,last sunday中last应为Last.surprise 改为surprising.was smiled改为smile.examinaton改为examination. fiend in need is friend indeed改为a friend in need is a friend indeed.

英语中不会每句都以人名代词开头，不会总是说I怎么怎么样，Frank怎么怎么样。

虽然你作文里没大错，但是总是觉得是中国人翻译的生硬的句子，不自然~