请帮忙看看这几句英文，如何修改

I'm grateful for your mail of April 10, 2007.It's proved be great benefit to me.
I appreciate your help.

In my future work, I think, perhaps you would give me some assistant.I'll be very happy if so.
想表达的：是在以后的工作中，可能还有一些问题需要您的帮助，如果您能不吝赐教的话，我会非常感激的。

I'm grateful for your mail of April 10, 2007.It's proved(+to) be (+a)great benefit to me.
I appreciate your help.

In my future work(work in the future), I think, perhaps you would(can) give me some assistant(assistance).I'll be very happy if so

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问题补充：想表达的：是在以后的工作中，可能还有一些问题需要您的帮助，如果您能不吝赐教的话，我会非常感激的。===

那么建议你这样说:" There may be more problems which need your help in my work in there future. I will be quite appreciative if you could offer your help"

更加能够被对方接受

I'm grateful for your mail on April 10, 2007.It has prooved to be of great benefit to me.
I really appreciate your help.

In my future work,I wish you could give me more assistant.I'll be very happy if so.

1 it's proved (这个地方加to)
2 (加a) great benefit
3 give me some (assistant改成help)
4 i'll be happy if (it is so)
括号里面是改动的部分 能看清楚吗？