How to say in Czech: He is such a funny boy!

English
is such a
Czech
On je tak vtipný kluk!
He is funny.
He is trying to be funny.
Say something funny!
I don’t find it funny at all.
He is such a boring boy!
Does he know this boy?
What is this boy doing here?
Who is this boy?
Why is this boy here?
Does anybody know this boy?

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