There are different types of clauses including adverb clauses, adjective clauses, and noun clauses. Adverb clauses are subordinate clauses that modify verbs and always begin with a subordinator like "because" or "when". Adjective clauses modify nouns and begin with relative pronouns like "who" or "that". Noun clauses can act as subjects, objects, or objects of prepositions in sentences, often being the object of a verb. They are introduced with subordinators like "that" or "what".