what are complex sentences
Definition. A complex sentence is a sentence that combines one independent clause with at least one dependent clause. A clause is a group of words that has both a subject and a verb. An independent clause forms a complete thought.n complex sentences, subordinate clauses function within the sentence as adjectives, adverbs, or nouns. An adjective clause is a dependent clause that functions like an adjective; an adjective modifies or describes a noun. In this sentence, The President chose people who would help him make good decisions.