Yusufzai Jaana ... I'm one of those exhiles whose formal schooling is entirely in English, so I'm not an expert on Pashto academics. Over the years, my Pashto has been driven mostly by exposure, familiarity and pure selfish volition. As an adult, I've hunted around for grammar instructions, but you know, most people don't just sit around reading up grammar - or do they? I use this kind of material increasingly, however, for checking up on questions that I have etc.

This was a good explanation of the current debate: http://www.pashtunforums.com/262462-post213.html. It appears very logical when explained like this.

Manana Graana.