= THERE IS, THERE ARE
PRESENT
hay - there is, there are
PRESENT SUBJUNCTIVE
haya - there is, there are
PERFECT
ha habido - there`s been
PRETERITE
hubo - there was
IMPERFECT
había - there were
IMPERFECT SUBJUNCTIVE
hubiera - there were
PLUPERFECT
habia habido - there had been
FUTURE
habra - there will be
CONDITIONAL
habría - there would be
Other irregular er verbs like hay