Uno de los faros no funciona bien desde ayer.

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Breakdown of Uno de los faros no funciona bien desde ayer.

• bien: well
• uno: one
• funcionar: to work (to function)

Questions & Answers about Uno de los faros no funciona bien desde ayer.

Why is it uno de los faros and not just un faro?

Because uno de los faros means one of the headlights / one of the lighthouses.

• un faro = a headlight / a lighthouse
• uno de los faros = one of the headlights / one of the lighthouses

You use this structure when something belongs to a group:

• uno de los libros = one of the books
• uno de mis amigos = one of my friends

Here, the speaker is talking about one item out of several.

Why do we use uno instead of un here?

Because uno is a pronoun here, not just an article.

Compare:

• un faro = a headlight / a lighthouse
  
  • Here un is an article before a noun.
• uno de los faros = one of the headlights
  
  • Here uno stands on its own and means one.

So in uno de los faros, uno is functioning like the English word one.

Why is the verb funciona singular if faros is plural?