你能给我回信，我很感谢你了。翻译成英文

Ah
! such a perfect answer!!

or you can also say..Thank you so much for replying my letter.

你能给我回信，
我很感谢你了

You can give me to reply in writing,
I thank you very much

Thank you for your reply

Thank you for your reply.

I appreciate you very much for replying to me.

Thank you for your reply