The Auxiliary Verb Haber in its Transitive Form

The verb haber exists in the Spanish language in two separate and distinct formats: as a transitive verb (there is, there are), and as an auxiliary verb (to have + participle).

In its transitive sense, the verb haber only is visible in its third person singular conjugation, despite whether or not the direct object is plural or singular. Observe:

Hay muchos carros en el taller. There are a lot of cars in the shop.
En la Avenida Chapo hay un accidente terrible. On Chapo Avenue there is a terrible accident.

You can also express anything in the past tense using haber:

Hubo un terremoto grande en San Francisco en 1989. There was a large earthquake in San Francisco in 1989.
Lo que había en la caja era muy extraño. Whatever there was in the box was very strange.

Or, the future tense can be implemented:

Habrá una fiesta en mi casa esta noche. There will be a party at my house tonight.

You can even migrate over to the subjunctive mood using haber in its transitive sense:

Es importante que haya un consejero disponible. It's important that there is a counselor available.