Compound-Complex Sentences in Greek grammar are characterized by being a combination of both Complex and Compound sentences. They contain at least two independent clauses and at least one dependent clause. The use of conjunctions and punctuation is crucial in these sentences as they perform the task of connecting different ideas and information in a clear and comprehensive manner. These sentences are an integral part of advanced Greek grammar, and understanding how to construct them properly can greatly enhance one’s fluency and communication skills in the Greek language.