Subject:
* Who or what the sentence is about. It's the person, place, thing, or idea that performs the action or is described.
* Typically comes before the verb.
* Answers the question "Who?" or "What?"
Verb:
* Shows the action or state of being of the subject.
* Tells what the subject does, is, or has.
* Often comes after the subject.
* Answers the question "What does the subject do?" or "What is the state of being of the subject?"
Example:
* The cat (subject) purrs (verb).
* The cat is the subject (who is purring).
* Purrs is the verb (what the cat is doing).
In a nutshell:
* The subject is the "doer" or "be-er" of the action.
* The verb describes the action or state of being.