vosotros, vosotras— you (informal or familiar plural; the first form refers to a group of males or males and females, while the second form refers to females only; this pronoun is seldom used in most parts of Latin America) ustedes— you (formal plural) ellos, ellas— they (the first ...
This is essentially the equivalent of the English “would” do something. This could be both in the case of a condition, such as “I would go if you wanted me to” (Yo iría si tú quisieras), or when referring to the future from a point in the past, like “She asked me if I ...