convertisteis

Convertisteis is a Spanish verb form that appears in two related conjugation patterns: it is the preterite (past) second-person plural form of the verbs convertir and convertirse. When used with a direct object, it means “you all converted (something).” When used reflexively, as convertir se, it means “you all converted yourselves” or “you all became.” The form is typical of the vosotros form used in Spain; in most of Latin America, the corresponding preterite is built with ustedes, which uses different endings.

Conjugation overview: in the visible form convertisteis, the verb is in the preterite for vosotros. With the reflexive version, os convertisteis, the meaning changes to a reflexive construction: you all became or you all turned yourselves into something. The same spelling appears for the two verbs in this tense, but the underlying meaning depends on whether a direct object is present (convertir) or a reflexive pronoun appears (convertirse).

Usage notes: convertisteis is common in formal Spanish taught in Spain and in literature that preserves the vosotros form. In regions where ustedes is standard, you would typically use ustedes convirtieron or se convirtieron in the preterite, or the equivalent non-reflexive form for convertir. The verb convertir itself covers a range of senses from “to convert” or “to transform” something (transitive) to “to become” (reflexive, in the sense of changing state).

Etymology: both verbs derive from Latin convertere, meaning to turn around or change. The reflexive form convertir(se) adds the pronoun se to express change of state relative to the subject.