What is a complex sentence?

A complex sentence is defined as a sentence that includes one independent clause and at least one dependent clause. The independent clause expresses a complete thought and can stand alone, while the dependent clause adds additional detail but cannot stand alone. For example, in the sentence "Although it was raining, we went for a walk," "Although it was raining" is the dependent clause, providing context, while "we went for a walk" is the independent clause presenting the main idea.

This structure allows complex sentences to convey more intricate ideas and relationships between concepts, which is essential for effective writing and communication. The presence of a dependent clause introduces a level of complexity that enriches the sentence by offering reasons, conditions, or contrasts, thereby enhancing the clarity and depth of the information presented.