speak English while dreaming???

It`s my first time to write on a blog.. I don`t really know what I`m going to write about..However, I hate writing, but I want to improve my English ability... I once heard my lecturer said that if we speak english in our dream, it means we are already good at English.. I sometimes speak English in my dream but just simple sentence like "Yes, No, Can we go now?"..Does those simple sentence can be counted to prove that we are already good at English?? I still don`t know the answer for my English is so so till know..!!! I hope one day I can speak English fluently, then it`s my turn to teach children `bout English...