How to say in Czech: It happened twenty days ago.

English
It happened ago.
Czech
Stalo se to před dvaceti dny.
It cost me twenty crowns.
It costs twenty crowns.
I paid twenty crowns for that.
It happened a long time ago.
It happened the day before yesterday.
It never happened.
Nothing happened to me.
That’s never happened to me before.
What happened to you?
I finally found out what happened.

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