Every sentence needs 3 elements: 1. subject-who or what the sentence is about 2. predicate-tells something about the subject 3. complete thought -Example: Kevin jingled the keys loudly.
A sentence that is missing a subject, a predicate, or the words do not express a complete thought. -Example: Jingled the keys loudly (missing subject) Mr. and Mrs. Duncan and their dog (missing predicate)
When two sentences are connected without correct punctuation or a connecting word. -Example: The walks were covered with snow my dad went out to shovel.