instruíste

Instruíste is a verb form used in some Iberian Romance languages to express the action of instructing in the past. It is the second-person singular preterite of the verb instruir, corresponding to “you instructed” in English. The form is primarily found in Portuguese and Galician; in Spanish-language texts the equivalent is instruiste.

Morphology and formation: It is built from the stem instruí- plus the preterite ending -ste for the second-person singular. The accent on í marks the stressed syllable. The full conjugation of instruir in this tense includes eu instruí, tu instruíste, ele instruiu, nós instruímos, vós instruístes, eles instruíram.

Usage: In Portuguese, the form is used in contexts where the informal subject pronoun tu is present; in many varieties the pronoun você replaces tu and the verb form changes to instruíu or instruíu-like third-person forms. In Galician, a similar second-person singular preterite form exists. Outside of these varieties, especially in Standard Spanish contexts, the exact spelling and usage may differ, with instruiste serving as the corresponding form there. Overall, instruíste marks a completed action in the past.

Example: Ontem, tu instruíste os alunos sobre as regras.