Learn Turkish: Kayıp eşya ofisi neresi? - Where is the lost property office?

Nerede asks about location (literally "at where?"). Neresi acts as a pronoun asking for the identity of a place ("what place?"). Here, the sentence literally means "What place is the lost property office?" You use neresi when you want someone to identify or point out a location, rather than just telling you what it is inside or near.

Why is the word for office ofisi instead of just ofis?

It has the third-person possessive suffix -i because it forms a noun compound. Kayıp eşya (lost property) modifies ofis (office). To link them together into a single concept (lost property office), Turkish requires the possessive suffix on the second part: Kayıp eşya ofisi.

Why is eşya singular here? Shouldn't it be plural if we are talking about lost "things"?

Eşya technically comes from an Arabic plural meaning "things," but in modern Turkish, it acts as a collective noun meaning "stuff," "belongings," or "property." When making a general category in a noun compound, Turkish prefers the singular, which is why we don't say kayıp eşyalar ofisi.

Where is the "is" in this sentence? Why doesn't it end with a verb?