The composite sentence is a sentence consisting of two or more clauses that form a single syntactic unit. Clauses can be joined through coordination or subordination to form compound or complex sentences. Compound sentences consist of two or more coordinate clauses of equal rank joined by coordinating conjunctions like "and", "but", or "or". Coordinate clauses can be joined copulatively, adversatively, disjunctively, or causatively-consecutively depending on their meaning and relationship.