Here's a breakdown:
* Subject: The person, place, thing, or idea that performs the action of the verb.
* Compound Subject: Two or more subjects joined together by a conjunction (usually "and" or "or") that share the same verb.
Example:
* The cat and the dog played in the garden.
In this example:
* "The cat" and "the dog" are the two subjects.
* "played" is the verb, and it applies to both subjects.