Some past participles are irregular. For example, He hecho mis deberes - I ... The first part of the perfect tense is the present tense of the verb haber, which is known as an auxiliary verb.

The first part is often the verb avoir ‎- ‎to have and the second part is the past participle.‎ For example, j'ai mangé un sandwich - I have eaten a sandwich. You take the form of avoir you ...