Review: All main ideas must be complete sentences. In order to formulate an implied main idea, you must be able to tell when you have written a complete sentence. Sentences can be very long or very short. Regardless of its length, every sentence must contain both a subject and a predicate.
Directions: Read each item below and decide whether it is a sentence. Type “T” in the blank if an item is a sentence; type “F” if it is not a sentence. (A period has been placed at the end of each item whether it is a sentence or not.) An example has been worked for you.
Example: F An empty backpack.
Explanation: This is not a sentence because there is no verb; also, it does not make a statement or tell anything about the backpack.