It is the main word or word group that tells whom or what the sentence is about
Simple subject
It consists of all the words in the subject
Complete subject
It tells something about the subject
Predicate
It tells whow or what the sentence is about
Subject
It is the main verb in the sentence
Simple predicate
It is everything that is said about the subject
Complete predicate
It consists of two or more subjects that are joined by a conjunction and that have the same verb
Compound subject