I am not an expert, but in my understanding verbs are usually listed and learned in the 3rd Person Masuline Singular Past Tense form. So it isn't the root per se but rather just the default form of representing a verb.

hi Jason! yes, it is the root!

Hi Konrad! The correct form is bitfakker. In fact, the "she form" always begins with bit (not but). <3

It would be intu bto2rau!

Hi Noor, great question... the Qaaf is a controversial letter even between native speakers so you will often see different pronunciations for it. However in this word, people will often pronounce like in fusHa because it wouldn't work if they said something like "2ara2/Ara2"... it just doesn't make sense nor does it sound right for native speakers so they pronounce the Qaaf instead.

Hi barb, unfortunately we don't have a list of the roots, but I can help you with explaining any word you need if something is unclear to you

Hi Courentey, technically yes there is a rule, although you might feel it make things more complicated. So the "و" is added to words whose roots are hollow, meaning words whose roots have a "ا"، "و"، "ي" in the middle. So the root for "بيروح" is "راح" and for "بيكون" is "كان" so they get a "و". while the root for بيشرب is شرب and it has an ر in the middle so it doesn't get the و