Here's why:
* Subordinate clauses (also known as dependent clauses) can't stand alone as a complete sentence. They always rely on an independent clause to provide the complete thought.
* Independent clauses have a subject and a verb and express a complete thought.
Here's an example:
* Fragment: "Because I was tired."
* Independent clause: "I went to bed early."
Combined sentence: "Because I was tired, I went to bed early."
Other ways to fix sentence fragments:
* Add a subject and verb: If the fragment is missing a subject or verb, you can add them to make it an independent clause.
* Reword the fragment: You can sometimes reword the fragment to create an independent clause.
Remember: Sentence fragments can be confusing for readers and should be avoided in formal writing.