"Ти знаєш, де наше купе?"

Translation: Do you know where our compartment is?

[Zarina_M]

Почему нельзя так: Do you know where is our compartment?

[skstudio]

Because "... where our compartment is?" is an indirect question and its word order is different from the word order of a direct question (e.g., "Where is our compartment?").

[PavelsVas]

Brits hardly use such a word order. Answer still should have been accepted (with an asterisk, if someone feel, that it makes the cardinal change to the meaning of the question)

[Zarina_M]

Thank you. This information is very useful for my english!