How to say in Czech: He knows what we did last year.

English
knows what did last year.
Czech
On ví, co jsme dělali minulý rok.
What did he do last year?
He knows what we did yesterday.
What happened last year?
He knows what we think.
It happened last year.
He knows what he needs.
When was the last time we saw each other?
We don’t know what he means by that.
He knows.
He knows her address.

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