Sentence: Do you know where does John sit?

[Sureshvemuri]

Is this correct sentence:

"Do you know where does John sit?"

Thanks,
Suresh

[Daemon99]

Do you know where John sits?
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Non-native speaker of English
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I intend to live forever - so far, so good.

[Kitosdad]

You could also say, " Where does John sit, do you know.?
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If you need me, I'm here.

[Infin1ty]