How to say in Czech: It happened three hours ago.

English
It happened ago.
Czech
Stalo se to před třemi hodinami.
It happened a long time ago.
We walked about three hours.
It happened last week.
It never happened.
Nothing happened to me.
That’s never happened to me before.
What happened to you?
I finally found out what happened.
I wanted to find out what had happened.
Nothing happened.

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