"Do we have potatoes?"
Translation:У нас есть картошка?
My question exactly...then I thought "Ooop, potatoes are a direct object of 'have' and so should be accusative...or should it be genitive because we're talking about possession?" But now we're back to nominative? This sentence popped up in the middle of strengthening the "Questions" skill so it's been a while since I reviewed possession questions; and my head is spinning...
When a Russian asks: У тебя есть картошка? they want to know if you "own" potatoes (if you HAVE them). This is why you would use есть in the question. When a Russian asks: У тебя большая картошка? they want to know if your potato(es) are "big". They already know that that you have potatoes so ownership isn't in question.