请英语好的朋友帮助纠正一下我的写作：“For some reasons, I still didn't re。。。”

（我的英文现在确实是真的不怎么样，如果你不明白我做写的句子，请至少帮我把明显的语法错误修正一下。谢谢）

For some reasons, I still didn't receive your email, could you please send me again?

About the make up exam, I think Monday is better for me. Since, 理论上, student could change subject at the first four weeks. And it is very important to me if I could take another subject in this semester.

Please consider this, thank you.

Dear xxx（你老师的名字）
For some reasons, I still haven't received your email, could you please send me again?

As for the make up exam, I think Monday works best. Theoretically, student could change their subjects at the first four weeks, so it is crucial for me if I could take another subject in this semester.

Please consider this, thank you.
Best,
xxx（你的名字）

额