How to say in Czech: They know what I did last year.

English
know what did last year.
Czech
Oni vědí, co jsem dělal minulý rok.
What did they do last year?
What happened last year?
It happened last year.
I know what they did yesterday.
When was the last time they saw each other?
I want to apologize for my behaviour last night.
I don’t know what they mean by that.
Get off at the last stop.
This is the last stop.
They don’t know what to do anymore.

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