instruisteis

Instruisteis is the second-person plural preterite form of the Spanish verb instruir, meaning you all instructed. It is used with the subject vosotros, which is common in Spain and some regional varieties, to describe a completed action in the past.

Conjugation and form details: Instruir is an -ir verb that forms its preterite with a combination of endings and stem changes typical of -uir verbs. The full preterite paradigm for instruir is: instruí, instruiste, instruyó, instruimos, instruisteis, instruyeron. The vosotros form, instruisteis, follows the regular -isteis ending for this group and does not introduce the irregularity seen in the third-person forms (instruyó, instruyeron).

Usage notes: Instruisteis is used when addressing a group informally in the past in regions that use the vosostros form. In many Latin American dialects, where vosotros is not used, the corresponding past tense is formed with ustedes, typically instruyeron (or another form depending on regional conjugation). The verb is transitive and commonly followed by a direct object or a prepositional phrase, as in instruisteis a los alumnos en las políticas de seguridad.

Example: Ayer instruisteis a los nuevos empleados en el protocolo de seguridad. In a Latin American variety: Ayer ustedes instruyeron a los nuevos empleados.

Etymology: Instruisteis derives from instruir, which comes from Latin instruere, meaning to build up, educate, or instruct.

See also: instruir, pretérito, vosotros, conjugación verbal.