The 18 tenses of the Spanish verb hay (there is / there are)

It appears there might be a slight misunderstanding. The Spanish verb haber is the root for both the auxiliary verb "to have" and the impersonal form hay ("there is/there are"). The table I previously provided covered the full conjugation of haber as an auxiliary verb, which includes the impersonal form ha habido.

The word hay is a special, impersonal form derived from the third-person singular of the present tense of haber. Because it is impersonal, it only exists in this singular form and doesn't change based on who is doing the action (e.g., I, you, we). It means "there is" or "there are" and is used to talk about the existence of something.

Here is a table showing the full conjugation of haber as an impersonal verb, with each form corresponding to the meaning "there is" or "there are" in different tenses.

Impersonal Conjugations of "Haber" (Meaning "There Is / There Are")

Tense	Spanish Conjugation	Example Sentence
Present	hay	Hay un libro en la mesa. (There is a book on the table.)
Simple Past	hubo	Hubo un accidente anoche. (There was an accident last night.)
Past Imperfect	había	Había mucha gente en la fiesta. (There were a lot of people at the party.)
Simple Future	habrá	Habrá una reunión mañana. (There will be a meeting tomorrow.)
Simple Conditional	habría	Habría más espacio si no estuviera el sofá. (There would be more space if the sofa wasn't there.)
Present Perfect	ha habido	Ha habido un cambio en el plan. (There has been a change in the plan.)
Past Perfect	había habido	Me dijeron que había habido un problema. (They told me there had been a problem.)
Past Anterior	hubo habido	Cuando hubo habido un problema, lo resolvimos. (When there had been a problem, we solved it.)
Future Perfect	habrá habido	Para ese momento, habrá habido muchas oportunidades. (By that time, there will have been many opportunities.)
Conditional Perfect	habría habido	Habría habido más tiempo si hubiéramos empezado antes. (There would have been more time if we had started sooner.)
Present Subjunctive	haya	Es bueno que haya sol. (It's good that there is sun.)
Imperfect Subjunctive	hubiera/hubiese	Ojalá que hubiera paz. (I wish there were peace.)
Future Subjunctive	hubiere	Si hubiere algún problema, me lo dirás. (If there is any problem, you will tell me.)
Present Perfect Subjunctive	haya habido	Dudo que haya habido un robo. (I doubt there has been a robbery.)
Past Perfect Subjunctive	hubiera/hubiese habido	Si hubiera habido un retraso, lo sabríamos. (If there had been a delay, we would know.)
Future Perfect Subjunctive	hubiere habido	Si hubiere habido más de un ganador, se repartirá el premio. (If there has been more than one winner, the prize will be split.)