Simple Predicate Sentences. All the above sentences contain a definite verb which defines what the a simple predicate does not contain any object or modifier; Module 5, sentence parts, lesson 2:
Every sentence has a subject and a predicate.
Note that the simple predicates can have additional words describing them. As you can see from the example sentences above both the subject and the predicate can consist of. These sentences are very simple examples of what predicates are, since the predicate is expressed entirely by one verb. The simple predicate can be as simple as just one word.