Learn Hardcore Russian: Консультант в торговом центре помог мне. - The sales assistant in the mall helped me.

That’s the prepositional case (о-ком? о чём?). After в meaning “in” (static location), the noun phrase takes the prepositional case: в торговом центре means “in the shopping mall.”

Why is мне in the dative case?

The verb помог (“helped”) governs the dative for the person receiving help. So “helped me” requires мне (dative of “я”).

What does the past-tense form помог tell us about the consultant?

In Russian past tense, verbs agree in gender and number with the subject. Помог is masculine singular, so the consultant is male. A female consultant would be помогла.

Could I say Консультант торгового центра помог мне instead? What’s the difference?

Yes, that’s possible. Консультант торгового центра uses the genitive (торгового центра) as an attributive (“mall consultant” – one who works there). В торговом центре emphasizes location (“the consultant who was in the mall”).

Why is it в торговом центре and not в торговый центр?

В торговый центр (accusative) means “into the mall” (motion toward). В торговом центре (prepositional) means “in the mall” (no motion).

Can I reorder the sentence to Консультант помог мне в торговом центре? Would that still work?

Yes. Word order in Russian is quite flexible. Moving в торговом центре to the end is perfectly fine; it might slightly shift emphasis but the basic meaning remains “The consultant helped me in the mall.”

What exactly does торговый центр mean?

Literally “trade center” (торговый = “trade”/“shopping,” центр = “center”). It’s the standard term for “shopping mall.”