"When is it over?"
Translation:När är det slut?
I think so, but that's more like using the verb 'to end' or 'to stop'. The only verb in the sentence is 'to be' - is.
To clarify, there are two verbs att sluta. One means 'to stop' and it has the imperative sluta!
The other one is much rarer and has the meaning 'to close', (often used with 'eyes' for instance, does not fit for all kinds of closing) and the imperative of this verb is slut!
Slut ögonen! = Close your eyes! (somewhat formal: the normal expression is Blunda!)
Sluta skrika! = Stop screaming!