Haber

Present hay there is, there are
Imperfect había there was, there were
Preterite hubo there was, there were
Future habrá there will be
Conditional habría there would be
Perfect ha habido there has been, there have been
Pluperfect había habido there had been

Notes

  1. Haber can be used as an auxiliary verb to form compound tenses.
  2. Haber de + infinitive is used in a similar way to tener que + infinitive, e.g. he de ir - I have to go
  3. Hay que + infinitive means one must do something, e.g. hay que comer más fruta - one must eat more fruit.