How to say in Czech: They have known me for a long time.

English
have known for a long time.
Czech
Oni mě znají už dlouho.
Excuse me.
Do they understand me?
It happened a long time ago.
Long time no see.
How long have they been here?
How long have they been living here?
They do not know me.
They know me well.
They would like to get to know me better.
Where do they know me from?

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