Step 1

The preterite tense of haber is hubo.
Hubo means there was or there were.

Hubo una explosión.
    There was an explosion.

Hubo más gente de la que invité.
    There were more people than I invited.

Hubo más de 50.000 espectadores.
    There were more than 50,000 spectators.

Hubo una tormenta de nieve anoche.
    There was a snowstorm last night.

Hubo muchos heridos durante la manifestación.
     There were many injured during the protest.

¿Hubo algún descuento?
     Was there any discount?

Hubo daños?
     Were there any damages?

Hubo un accidente.
     There was an accident.