hello every one . i wonder how have you been able to find out when to use perfect verbs and when for imperfect ones ???
its blowing my mind and i have no clue what to do even though i know lots of words and have a good grasp of language except verb aspect !
There is a brief discussion of verb aspect in the LinQ grammar guide for Russian. You can find it by clicking on your profile icon in the upper-right corner of any page when your selected language is Russian. The discussion of aspects is near the bottom.
There is a course specifically about verb aspect at Login - LingQ
There are three lessons in that course. Maybe they will help.
Hopefully others can offer some more resources.