It’s the basis of ordinary etiquette / to be sure of your subject and your predicate.”  This song lyric from a children’s play about acceptable grammar is certainly true; however, not many people can point out the predicate in a sentence (even if they are sure of the subject). In reality, determining the predicate of a sentence isn’t that difficult.  It is simply a matter of knowing how sentences function, beginning with the parts of speech and the way that they relate to each other.  If you have trouble distinguishing your subject—or anything else, for that matter—from your predicate, read on for some helpful tips about what predicates are and how they work.
The part of a sentence or clause containing the verb and stating something about about the subject.