modificarlos

Modificarlos is the infinitive form of the verb modificar with the direct object pronoun los attached, meaning to modify them. It is a transitive infinitive and can also function as a noun (verbo sustantivado), referring to the act of modifying them. For example, in a sentence like Modificarlos es necesario para adaptar el sistema, the phrase serves as the subject.

In use, modificarlos appears with various auxiliary constructions and can refer to masculine or mixed gender objects. Examples include Quiero modificarlos (I want to modify them) and Voy a modificarlos (I am going to modify them). When the direct object is feminine, the corresponding form is modificararlas (to modify them, referring to feminine objects). The gerund form is modificándolos (modifying them), and the past participle is modificados.

The pronoun agrees with the gender and number of the direct object: los for masculine plural, las for feminine plural; modificarlos or modificarlas accordingly. Other related forms include modificar (the base verb), modificación (the act or process of modification), modificable (that can be modified), and modificado (modified). The infinitive with attached pronoun can appear before or after another conjugated verb, as in Los quiero modificar or Quiero modificarlos, with the pronoun attached to the infinitive in constructions like voy a modificarlos or quiero modificarlos.

Notes on style: in Spanish, the attached pronoun often clarifies the object without repeating it, but for clarity in formal writing, it is common to specify the object explicitly or restructure the sentence to avoid ambiguity.