What is a complex sentence?

A complex sentence is defined as one that includes at least one independent clause and at least one dependent clause. The independent clause can stand alone as a complete thought, while the dependent clause cannot stand alone and is often introduced by subordinating conjunctions such as 'because,' 'although,' or 'when.'

For instance, in the complex sentence "Although it was raining, we went for a walk," "we went for a walk" is the independent clause that can stand alone, whereas "Although it was raining" is the dependent clause that adds additional detail but cannot function independently.

Understanding the structure of a complex sentence is important in writing as it allows for the expression of more nuanced ideas and relationships between thoughts, enhancing clarity and depth in communication.