How to say in Czech: Do they understand us?

English
Do understand
Option 1 Option 2
Czech
Rozumějí nám?
Help us understand this.
Nobody understands us.
Nobody understands us here.
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.
That’s something they will never understand.

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