This distinction is actually one of perfective aspect.
The event in the past could be either stative, habitual, or perfective aspect, but not progressive.
The perfective aspect, on the other hand, has a specific suffix.
In English it can be used to refer to the simple past verb form, which sometimes (but not always) expresses perfective aspect.
In their place tar- develops from perfective aspect into a common past tense.
The perfective aspect of the past is used when the speech refers to past situations that were finished, or complete.
The perfective aspect depicts an action that has already been finished or done with.
The table below is showing 5 verbs both in their perfective and imperfective aspects.
The aorist participle may be used where the action is completed, called the perfective aspect.
This is the essence of the perfective aspect: An event presented as an unanalyzed whole.