How to say in Czech: I know what they did yesterday.

English
know what did yesterday.
Czech
Já vím, co dělali včera.
What did they do yesterday?
What did they do yesterday evening?
They did it yesterday.
What date was it yesterday?
What happened yesterday?
They weren’t born yesterday!
I want to apologize for my behaviour yesterday.
It happened the day before yesterday.
It was windy yesterday.
Why were you absent yesterday?

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