All the verbs here are in perfect preterit, which is a tense used to express an action happened in the past that are either still going on in the present or it's not clear if they have ended. Perfect preterit is always formed by the proper conjugation of the verb "haber" and the verb being used. However, some verbs are in indicative form and others are in subjunctive. Indicative form is used to indicate or state facts or actions, subjunctive form is used to express conditionals, supposition or hypothetical scenarios.
