Form the perfect tense using the auxiliary verb 'haber' and a past participle. Irregular verbs in the perfect tense in Spanish The perfect tense is made of the verb 'haber' and a past participle.

Open any major dictionary, digital or physical, turn to any irregular verb, and the first thing you see after the entry word ...

When you are writing, the verbs you use show if the events have already happened, are happening now or will happen in the future. The past tense is used for things that have already happened.