No hay una ventana.

There [isn't a window/aren't any windows].

1. Mi vecino no tiene ningún perro.
   My neighbour doesn't have [a dog/any dogs].
2. No hay ningún payaso allí.
   There aren't any clowns there.
3. No comieron ninguna alcachofa.
   They didn't eat any artichokes.
4. No hicieron ninguna pregunta.
   They didn't ask any questions.
5. No tengo ninguna hermana.
   I don't have [a sister/any sisters].