How to say in Czech: Do they understand it?

English
Do understand
Option 1 Option 2
Czech
Rozumějí tomu?
They do not understand it.
Do they understand?
They do not understand.
They do not understand this at all.
They do not understand this word.
They do not understand what the problem is.
They understand it.
They understood most of it.
That’s something they will never understand.
They are beginning to understand.

Czech phrasebook and translator with tens of thousands of sentences translated by humans. Czechslator is being developed by Michal Měchura. CREDITS Czechslator's sentence generation engine is partially based on Grammatical Framework. All Czech pronunciation is computer-generated using Microsoft Azure Text to Speech. When Czechslator cannot find a translation in its own database, it looks in the PanLex dictionary or obtains a machine translation from Microsoft Translator. PRIVACY Czechslator does not save any cookies in your web browser and does not collect personally identifiable data. Czechslator uses StatCounter for traffic analysis, configured not to save any cookies in your web browser and not to collect any personally identifiable data.