Here's why:
* They lack a complete thought: Dependent clauses contain a subject and a verb, but they express an incomplete idea. They leave the reader wanting more information.
* They act as modifiers: Dependent clauses often function as adjectives or adverbs, modifying the main idea expressed in the independent clause.
* They create a grammatical connection: They connect to the independent clause using conjunctions like "because", "although", "since", "while", etc.
Example:
* Dependent clause: "Because I was tired"
* Independent clause: "I went to bed early."
The dependent clause "because I was tired" provides a reason for the action described in the independent clause "I went to bed early." It doesn't make sense on its own.
In summary: Dependent clauses are like puzzle pieces that need to be connected to an independent clause to form a complete picture. They add detail and complexity to sentences but cannot stand alone as complete thoughts.