bailasteis
Bailasteis is the second-person plural form of the verb bailar in the Spanish preterite tense. It corresponds to “you all danced” or “you danced” when the vosotros subject is used. This form is characteristic of Spain and of speech communities that retain the vosotros form; in most Latin American dialects, the corresponding form is not used, and ustedes would take the preterite bailaron.
Morphology and conjugation: bailar is a regular -ar verb. In the preterite, the endings are -é, -aste,
Usage: The preterite expresses actions completed at a definite past time or sequence of past events. Bailasteis
Examples: En la fiesta de anoche, vosotros bailasteis durante horas. (At last night’s party, you all danced
See also: bailar, preterite, vosotros, ustedes, Spanish grammar.