What is a group of words that includes subject and verb but does not express complete thought called?

A group of words that includes a subject and verb but does not express a complete thought is called a phrase.

Here's why:

* Subject and verb: A phrase must have both a subject (who or what is performing the action) and a verb (the action being performed).

* Incomplete thought: A phrase cannot stand alone as a sentence because it doesn't convey a complete idea. It needs to be part of a larger sentence structure to make sense.

Example:

* "Running through the park" is a phrase. It has the subject "running" and the verb "through," but it doesn't express a complete thought. We need more information like "The dog was running through the park" to make a complete sentence.