Simple Subject Of A Sentence. Define complete subject: The definition of a complete subject is the subject of a sentence as well as any modifiers attached to it. However, a sentence can include other subjects that are the subjects of.
A sentence with complete subject and predicate: The dog outside the house barked at cars driving by. It appears before the predicate to show what the sentence is about, or what performs the action. The subject of the sentence is the noun that is doing or being something.
While the complete subject may contain modifiers (adjectives, relative clauses, and prepositional phrases), the simple subject contains only one, unmodified person, place, thing, or idea.
Ideally, a sentence requires at least one subject and one verb.
The subject of the sentence is the noun that is doing or being something. It is just the subject noun or pronoun without any other words that describe or modify it. Without them, sentences aren't really sentences; they're fragments.