Która forma jest poprawna: "Could you tell me where the nearest post office is" czy "Could you tell me where is the nearest post office"?

What time is it? / Could you tell me what time it is?
Who is that man? / Could you tell me who that man is?
When is he coming home? / Could you tell me when he is coming home?
Why are you laughing? / Could you tell me why you are laughing?
Where do they live? / Could you tell me where they live?
How do you say that in Spanish? / Could you tell me how you say that in Spanish?

Tak samo w twoim przykładzie:
Direct question: where is the nearest post offic? ale indirect question musi brzmieć tak: Could you tell me where the nearest post office is? Zatem tylko pierwsza forma jest poprawna.

Pierwsza forma jest poprawna. pzdr