Spanish - Irregular Past Participles

The perfect tense is used to indicate the completion of action. In English, the perfect tenses are formed by using "to have" followed by the past participle. In Spanish, the perfect tenses are formed by using haber followed by the past participle.

Regular past participles are formed by removing:

• the 'ar' of an infinitive and adding 'ado'
• the 'er' or 'ir' of an infinitive and adding 'ido'

Most past participles can be used as adjectives. Like other adjectives, they agree in gender and number with the nouns that they modify.