The word "mainque" is an archaic French contraction of "mais que," which means "when" in the context of a future event. While likely no longer used in France, it is commonly heard in Quebec French. For example, "Appelle-moi quand tu arriveras" (call me when you arrive) becomes "Appelle-moi mainque tu arrives" in Quebec, often with a further contraction like "t'arrives." The key characteristic of "mainque" is that it requires a verb in the subjunctive tense. So, "Appelle-moi quand tu seras arrivé" (call me when you have arrived) translates to "Appelle-moi mainque tu sois arrivé," using "sois" (subjunctive). Another instance is "Mainque j'aie 65 ans, je vais être à la retraite" (when I'm 65, I'll be retired), where "j'aie" is subjunctive. Thus, "mainque" functions as "when" but mandates the use of the subjunctive verb form, a feature frequently encountered in Quebec.