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 a verb but does not express a complete thought is called a phrase.

Here's why:

* Subject and Verb: Phrases must contain a subject (the person or thing performing the action) and a verb (the action itself).

* Incomplete Thought: Phrases lack a complete thought because they are missing key elements like a direct object, prepositional phrase, or other necessary components to convey a complete idea.

Example:

* "Running through the park" (Subject: implied "someone," Verb: "running")

* "The big, red ball" (Subject: "ball," Verb: implied action like "is," "exists")

Note: A phrase can also be a part of a sentence, often functioning as a noun, adjective, or adverb.