Carlotta Smith in the paper Reference Time without Tense in Recent Advances in the Syntax and Semantics of Tense, Aspect and Modality volume imposes the following condition.
The Bounded Event Constraint. Bounded situations are not located at Speech Time.
Does that mean that a bounded situation with duration cannot be said to be located now, and we cannot talk about events that are occurring ending? Or just that we cannot think that an event now has already ended?
The former seems a bit too much, but I don't know anything else about "bounded events" (because I don't have access to the necessary articles) and I think this captures a problem I have.
What if an event essentially occurs at some or all speech times, does that mean we cannot talk about it ending?