Personal pronouns substitute nouns and indicate who performs or receives the action. In Spanish they indicate person, number, and sometimes gender. They are the basis for agreeing with the verb and organizing the sentence. This module presents subject pronouns, object pronouns, and their basic features.

Spanish distinguishes first, second, and third person, and differentiates singular and plural. The person indicates who speaks, to whom one speaks, and about whom one speaks. The number indicates whether it refers to one or several. Pronouns are grouped according to these two categories to form the basic system of the language.

Subject pronouns indicate who performs the action of the verb. In Spanish they can be omitted because the verb ending usually identifies the person, but they are used for emphasis, contrast, or clarity. The system includes forms with and without gender distinction in the third person.

"Tú" and "usted" are second-person singular forms with differences in formality. "Vos" is a second-person singular form used in several regions and has its own conjugation features. The choice depends on the social context and on the variety of Spanish.

Object pronouns replace direct and indirect objects. They are placed before the conjugated verb or attached to an infinitive, gerund, or affirmative imperative. Their forms do not change for gender in the first and second person, but can change in the third person.

In Spanish, personal pronouns are organized by person and number and allow identifying the subject and the objects of the sentence. Their use varies according to social context and region, especially in the second person. Mastery of these pronouns is essential for constructing clear and coherent sentences.