How to say in Czech: Do they understand me?

English
Do understand
Option 1 Option 2
Czech
Rozumějí mi?
Nobody understands me.
Nobody understands me here.
You are the only one who understands me.
Help me understand this.
Do they understand?
They do not understand.
They do not understand her.
They do not understand this at all.
They do not understand this word.
They do not understand what the problem is.

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