How to say in Czech: He is such an impatient boy!

English
is such an
Czech
On je tak netrpělivý kluk!
He is trying not to be impatient.
Do not be impatient!
He is such a brave 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?
He is young.
He lives there.

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