What is the definition of complete subject and complete predicate?
The subject is who or what a sentence is about.
Derek loves goats. (In this sentence, Derek would be the subject.)
A simple subject is just one noun/noun phrase.
The gray cat stretched. (The simple subject would be cat.)
A complete subject is the simple subject and anything that is modifying the simple subject.
The gray cat stretched. (The complete subject would be the gray cat.)
The complete predicate is everything that goes after the subject. A sentence is made up of a complete subject and a complete predicate.
The gray cat played with a ball of yarn. ("The gray cat" would be the complete subject and "played with a ball of yarn" would be the complete predicate.)