How to say in Czech: Why do you want to be alone all the time?

English
Why do you want to be alone all the time?
Czech
Proč chceš být pořád sám?
I don’t want to go alone.
I don’t want to go there alone.
You had to do everything alone.
Did you came alone?
This is something I need to do alone.
You need to be alone.
Could I talk to you alone?
You were alone in the dark.
Are you alone here?
You are alone.

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