The document defines valency patterns as the elements that are required in a clause based on the main verb. There are five types of valency patterns: intransitive, monotransitive, ditransitive, complex transitive, and copular or linking verb. Intransitive patterns include only a subject and verb. Monotransitive patterns add a direct object. Ditransitive patterns include an indirect object and direct object. Complex transitive patterns can include a direct object and object predicative or direct object and adverbial. Copular patterns include a subject, verb, and subject predicative or adverbial.