Suppose i am going to ask somebody where does a specific person sits.
Should i ask,Where does Mr.Johnson sits.Is it right.
The answer to that would be:

Where does Mr Johnson sit?
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if it is sit,isn't it violating the subject verb agreement or does "does" imparts some changes,please explain me
Do I smoke?
Do you like tennis?
Do they go to mass on Sunday?

Does Maj make you smile?
Does Deepa come from India?
Does WW live in Chilie?

Notice all the verbs are in infinitive form when asking a question.
can i say"Where does Mr Johnson's seat?"

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