I know this question has been posed before, and I know also that there were different versions of putting it depending on models and different kinds of reasoning. What I want to understand, is the main difference between Tense and Aspect (grammatical one), provided that some languages exhibit morphological tense only in the Aorist, and the past and present are expressed & (methodologically) referred to as perfective and imperfective respectively.
What would be the difference here between tense and aspect?