Welcome to the forum.1. I want to ask you a question.
2. I want to ask a question from you.
3. I want to ask a question to you.
Please tell me which sentence is correct.
You're welcome. However, please don't refer to people here as "Sir" or anything similar. It's too formal and, if you use "Sir", it suggests you assume we're all men. We are not. A simple "Thank you" is enough and, to save time in the future, you can simply add the "Thanks" icon to any response you find helpful. Put your mouse over the "Like" button and "Thanks" is one of the icons that will appear. It looks like this:Thank you.sir.
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