construisteis

Construisteis is the second-person plural pretérito indefinido form of the Spanish verb construir, meaning "you all built." This form is used with the subject vosotros, the informal you plural in Spain and some other regions. In much of Latin America, where the vosotros form is not used, the past tense is expressed with ustedes: construyeron (they/you all built).

Conjugation and usage notes: construir is an -uir verb, and in the preterite it typically forms a y in the third-person forms (construyó, construyeron). The vosotros form, however, remains regular in this tense: construisteis. The full pretérito indefinido conjugation is: yo construí, tú construiste, él/ella/usted construyó, nosotros construimos, vosotros construisteis, ellos/ellas/ustedes construyeron. This form denotes a completed action in the past and is commonly used in narratives or recounts of past events.

Example: Ayer vosotros construisteis una casa en el barrio. This sentence illustrates the past action performed by the group addressed as vosotros.