"Hastaneden nereye gidiyorsun?" Translation: Where are you going from the hospital?
Nereye - Where to from the hospital & nerede - where is it.
Nere? - where? & Nereye - where to? The locative suffix endings -ye & -de will change the question word "nere" meaning.
"Hastane nerededir?" - Where is the hospital?
kind regards to you