Defining a Sentence Fragment
A sentence fragment is a sentence that:
Does not express a complete thought. Example: Joe is. This sentence is lacking a complete thought - Joe is "something" - but we don't know what Joe is.
Is lacking a subject. Example: Eating chicken. This sentence is lacking a subject - who or what is eating chicken?
Is lacking an action. Example: A book without a cover.What about a book without a cover? Is the book doing something? Is someone doing something to the book? We don't know, because there is no subject
Is a dependent clause, standing alone. Example: And I went to the store. The conjunction "and" makes this clause dependent. A dependent clause can't stand alone, it needs to be attached to an independent clause