estudiaste

Estudiaste is the second-person singular preterite form of the Spanish verb estudiar, meaning "you studied." It is used with the informal subject pronoun tú to refer to a completed action in the past, often in narration or conversation. A full preterite paradigm for -ar verbs would include: yo estudié, tú estudiaste, él/ella/usted estudió, nosotros estudiamos, vosotros estudasteis, ellos/ellas/ustedes estudiaron.

Etymology and form: Estudiar comes from Latin studēre, related to studium (study, zeal). In Spanish, it is a regular -ar verb, and the ending -aste marks the second-person singular preterite. This contrasts with other persons, which use -ó, -amos, -asteis, -aron.

Usage and regional variation: Estudiaste expresses a completed past action and is common in everyday speech across Spanish-speaking regions. In informal contexts, tú is frequently used in Spain and many parts of Latin America. For formal address, corresponding forms include usted estudió (you studied) and ustedes estudiaron (you all studied). In Spain, the vosotros form estudasteis is used for informal plural, while in many Latin American varieties the ustedes form is used for both formal and informal plural.

See also: estudiar; estudio; conjugation of estudiar; Spanish verb conjugation.