The New Grammar of the Spanish Language calls the irregular participles also strong participles because they present the accent in the root and tend to be inherited forms of Latin. Just as the irregularities of the conjugation have been studied by linguists, the same does not occur with the irregularities of the particles. Simply, the irregular participles come from Latin and you have to learn them as such. The classification that is shown for the irregular participles is made from an objective point of view and without entering to evaluate the linguistic considerations that could exist associated to each one. As in the rest of the articles, the idea is to help memorize and use better the conjugation of Spanish verbs from the study of groups of verbs that have a certain characteristic.