You're right that progressive verbs (e.g., "I am running") are typically formed from dynamic verbs. Dynamic verbs describe actions, and the progressive aspect shows that the action is ongoing.
Here's why:
* Stative verbs describe states or conditions, not actions. They don't typically change over time in the same way that dynamic verbs do.
* Examples of stative verbs: *know*, *love*, *own*, *believe*.
It wouldn't make much sense to say "I am knowing the answer" or "He is loving her." These sentences feel awkward because the state of knowing or loving is not a continuous action.
However, there are some exceptions:
* Stative verbs that describe a temporary state: "He's feeling better today." Although *feel* is typically stative, here it describes a temporary condition that is changing over time.
* "Sense" verbs: "She is seeing a doctor." While *see* is often stative (meaning "to perceive with the eyes"), it can also describe an action, like in this example.
In summary:
* Progressive verbs are mostly formed from dynamic verbs because they describe ongoing actions.
* Stative verbs usually don't have progressive forms because they express states, not actions.
* There are a few exceptions to this rule.