What is a sentence consisting of one independent clause and no dependent clause called?

A sentence that consists of one independent clause and no dependent clauses is identified as a simple sentence. Such a structure contains a subject and a predicate, expressing a complete thought. This straightforward design allows for clarity and direct communication without the complications of additional clauses that might introduce subordination or coordination.

In contrast, a compound sentence combines two independent clauses, typically linked by coordinating conjunctions, while a complex sentence includes at least one independent clause and at least one dependent clause, showcasing a relationship between ideas where one clause depends on the other for meaning. A compound-complex sentence, on the other hand, is characterized by having multiple independent clauses and at least one dependent clause, making it more intricate. Thus, the definition of a simple sentence aligns precisely with the criteria outlined, emphasizing its role as the most basic form of sentence structure.