It's possible you're thinking of:
* Progressive verbs: These verbs describe actions happening at a specific time. They are formed with "be" + the "-ing" form of the verb (e.g., "I am walking," "She is eating").
* Perfective verbs: These verbs describe actions that are completed. They are formed with "have" + the past participle of the verb (e.g., "I have eaten, "She has walked).
* Processive verbs: This is not a standard term in English grammar. There's a chance you're encountering it in a specific context, like a technical or philosophical discussion.
If you can provide more context about where you encountered this term, I may be able to give you a more accurate answer.