Falta una silla en la sala.

A chair is missing in the living room.

Breakdown of Falta una silla en la sala.

• la silla: the chair
• en: in
• la sala: the living room
• faltar: to be missing

Questions & Answers about Falta una silla en la sala.

Why is the verb falta used instead of hay?

We use faltar to express that something is missing or lacking, whereas hay simply states existence.

• Falta una silla → “A chair is missing.” (focus on the lack)
• Hay una silla → “There is a chair.” (existence)
  To say “there isn’t a chair,” you’d use No hay una silla, not No falta una silla.

Could we say hace falta una silla en la sala instead?

Yes. Hace falta + noun and falta + noun are both common ways to say “is needed” or “is missing.” In Latin America, they’re largely interchangeable:

• Falta una silla en la sala.
• Hace falta una silla en la sala.
  Some speakers feel hace falta sounds a bit more conversational, but there’s no major difference in meaning.

Why is the verb falta singular here?

In Spanish, the verb agrees with what’s missing (the grammatical subject). Since una silla is singular, we use falta (3rd-person singular).
If more chairs were missing, you’d say:

• Faltan dos sillas en la sala.

What is the function of una in ? Could we omit it?