The conjunction as has a number of various meanings. We use as when a person party occurs when A different is in development (‘over the time that’). In such cases the verb after is commonly in the continuous type: Three playing cards from the Visconti-Sforza tarot deck: Ace of cups, https://amarres-de-amor41732.ja-blog.com/28049893/new-step-by-step-map-for-significados