Auxiliary verbs help form different tenses, moods, and voices in Spanish, so knowing them lets you express time, intention, and nuance more precisely. This guide covers the main auxiliaries like haber, estar, and ir when they function to help other verbs.
Haber
Haber is the key auxiliary for forming compound tenses like the perfect, and it appears as he, has, ha, etc. when you link it to a past participle. This structure shows actions that are completed relative to a reference time.
Present Perfect
Last updated: Fri Oct 24, 2025