It is a detailed issue that needs more than writing few lines. http://arabic.speak7.com/arabic_verbs.htm

Chugs, next time mention me so I can be notified. You can do that by copying my name and paste it (not writing it letter by letter). Absolutely, I recommend you to study Fusha as it has a constant and clear grammar. While the Levantine doesn't have any grammar rules, and people write and speak it differently even if they were from the same place/area. Levantine includes many countries that each of them have a certain dialect for it.

I'm not sure if the Fusha tense grammar is similar or the same to Levantine, hence why I worded my question so specifically. I have a primary focus on Levantine Arabic, but let me know if you'd recommend studying Fusha grammar or Levantine unexisting! Thanks!^^

So do you want a standard Arabic grammar (Fusha) or a Levantine unexisting grammar (Slang)?