Breakdown of Wo ist dein Schlafsack? Hast du keinen?
sein
to be
du
you (informal singular)
haben
to have
wo
where
Questions & Answers about Wo ist dein Schlafsack? Hast du keinen?
Why does the second sentence use keinen instead of kein?
In this sentence, keinen is acting as a pronoun, meaning it completely replaces the noun instead of just sitting next to it. It stands in for keinen Schlafsack (no sleeping bag). Since der Schlafsack is masculine and is the direct object of the verb hast (accusative case), the pronoun takes the masculine accusative ending -en.
How can I figure out the gender of Schlafsack just by looking at this sentence?
The word dein (your) in the first sentence tells you it is either masculine or neuter, since it has no ending in the subject (nominative) position. But the real giveaway is keinen in the second sentence! The -en ending on a direct object (accusative case) is only ever used for masculine nouns. Therefore, it has to be der Schlafsack.
If I wanted to ask "Do you have ONE?", how would I say that?
You would use the indefinite pronoun einen. Just like keinen, it needs to match the gender and case of the missing noun. Since it replaces the masculine, accusative Schlafsack, you would ask: Hast du einen?
In English, we would normally ask "Don't you have one?" rather than "Do you have none?". Is this normal in German?