What is a Complex Sentence? Ссылка на обучающий ресурс: Grammar Structure of Complex Sentences A complex sentence is a sentence that contains an independent clause and one or more dependent clauses. An independent clause can stand alone as a sentence, but a dependent clause even though it has a subject and a verb cannot stand alone. Here are some examples of complex sentences. The independent clause is in bold; Complex Sentences Explained As you may have noticed from the examples above, a complex sentence can either start with the independent clause or the subordinate clause . If the subordinate clause comes first, you must add a comma . This is not needed if the independent clause comes first. An independent clause contains a subject and a verb , it can stand alone as a complete thought. The football match was cancelled. A subordinate clause cannot stand alone, it needs to be linked to the independent clause to make s...