Translation:Mom are you going to Shiprock?
what's the function of da' here?
Da' is a question marker.
Akin to French "Est-ce que"
Shimá, Naat’áanii Néézgóósh díníyá?
Also, Shiprock has another name, Tooh. I say it as Tooh, I always heard my family use Tooh versus Naat’áanii Nééz.