This document discusses independent and dependent clauses. It defines an independent clause as having one subject-verb pair and expressing a complete thought, essentially being another name for a simple sentence. A dependent clause is defined as an independent clause with a subordinating word like "because" or "when" added to the beginning, making it unable to stand alone as a complete thought and requiring it to be joined to an independent clause. Several examples of independent and dependent clauses are provided. The document also discusses subordinating conjunctions that can introduce dependent clauses and lists some common time-related subordinating conjunctions like "after", "before", and "when".