Mandaly, "Ou konnen ki kote Mak ye?" Do you know where Mark is? How do you say in HC, "Do you know where Mark was?" e "Did you know where Mark was?" Mesi anpil.

The translation you have is right, for the first one.  You can ask this question in a variety of ways using ESKE or NOT, using KONNEN or KONN, using KOTE, KI KOTE, KOT or KIBÒ:

Do you know where Mark is?
Eske w konnen kote Mak ye?
Eske w konn ki kote Mak ye?
Ou konnen ki kote Mak ye?
Ou konn kibò Mak ye?

Do you know where Mark was?
Ou konnen ki kote Mak te ye?
Eske ou konn kote Mak te ye?

Did you know where Mark was?
Eske w te konn kot Mak te ye?

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