How to say in Czech: Do they know this gentleman?

English
Do know this
Czech
Znají tohohle pána?
Does anybody know this gentleman?
What is this gentleman doing here?
Who is this gentleman?
Why is this gentleman here?
Do they know each other?
Do they know her address?
Do they know Miss Nováková?
He knows what they did last year.
He knows what they did yesterday.
I don’t know if they have the time.

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