Action (dynamic) verbs are present in 2 different forms:
The progressive which means that the action is not completed (finished) and the perfect which means that the action is completed.
Action verbs have final (resultant) states. İf we have reached this resulting state which is the final point of an action verb then we can say that this action is completed and we can express this completeness by using perfect aspect.For example:
"I have reached the house."
This means that the action of reaching the house is completed.I am currently in the final state of the action which is my being in the house. I once was a different location from my house then I came to a different place which is located between my start point and the house then finally I am at the final destination (the house).İn order to complete this action,my state (which is my location in this example) constantly changed.
When it comes to a stative verb like "to be" or "to own",there is only one state being expressed by this stative verb in contrast to an action verb which is composed of different states (The first state,states that are located between the first and the final states while the action is progressing,the final state)
Finally my question is this:
Can a stative verb be completed or is the concept of completing (or finishing) only restricted to action (state changing,dynamic) verbs?