How to say in Czech: That was very impolite of them.

English
That was very impolite of
Czech
To bylo od nich velmi nezdvořilé.
I am trying not to be impolite.
You are such an impolite boy!
That was not very polite of them.
That was very kind of them.
That is very kind of them.
Do you understand them?
That is not very convincing.
That is very expensive.
I didn’t find that lecture very interesting.
You have a very good sense of smell.

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