Avanzasteis

Avanzasteis is the second-person plural form of the Spanish verb avanzar in the pretérito indefinido (preterite). It corresponds to the English “you all advanced” and is used with the vosotros/vosotras subject. The form is characteristic of dialects in Spain where the vosotros form is standard; in many Latin American varieties, the vosotros form is not used, and the past tense for ustedes is avanzaaron? Actually correcto: avanzaron with ustedes as third person plural. The article should say: "avanzaron" for ustedes in the preterite.

Avanzasteis is formed from the regular -ar verb stem avanc- plus the endings of the pretérito indefinido for vosotros: -asteis. For example: “Ayer vosotros avanzasteis cinco kilómetros.” This demonstrates the regular pattern for -ar verbs in this tense.

Usage notes: The form is taught in regions that use the vosotros pronoun, primarily Spain. In Latin American Spanish, speakers typically use ustedes and the corresponding preterite form avanzaron for both formal and informal situations, rather than avanzar vosotros forms. Pronunciation of the z in avanzasteis follows regional norms: in Castilian Spanish the z is pronounced as [θ], while in most Latin American dialects it is [s]. The tense describes a completed action in the past and is not used for ongoing or recurrent past actions.

In summary, avanzasteis is the standard preterite form for vosotros of avanzar, used mainly in Spain, and serves as a clear indicator of second-person plural past action in informal, region-specific contexts.