[DougLewis]

Originally Posted by YuriTokoro

One more question!
Is this sentence correct? Do you understand what I mean? Isn’t this rude?
Could you tell me a politer expression?

“May I use your answers in my own webpage? If you don’t like it, let me know it, please.”

Thank you!

I did not see this as rude at all.

Although, since the question is a request and a favor being asked, it is sometimes good to mention "why?".

Perhaps something like this.

"Your answers are very good and I was wondering if you would mind if I use them in my own web site to benefit others. I will give you credit of course. If you prefer that I don't, please let me know, I would certainly understand why, if you prefer I did not."

This is polite and lets the person know you appreciate their work and that your purpose is to share that good work.

(Just a suggestion.)