How to say in Czech: He has known us for a long time.

English
has known for a long time.
Czech
On nás zná už dlouho.
Excuse us.
Does he understand us?
He does not know us.
He knows us well.
He would like to get to know us better.
It happened a long time ago.
Where does he know us from?
He has a long face.
Long time no see.
He has long arms.

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