| Term | Definition |
| Clause | is a word group that contains a verb and its subject and that is used as a sentence or as part of a sentence |
| Independent Clause | expresses a complete thought and can stand by itself as a complete sentence (also called main clause) |
| Subordinate CLause | does not express a complete thought and cannot stand by itself as a complete sentence (also called dependent clause) |
| Adjective Clause | subordinate clause that modifies a noun or pronoun |
| Relative Pronouns | That, Which, Who, Whom, Whose |
| Adverb Clause | is a subordinate clause that modifies a verb, an adjective, or an adverb |
| Common Subordinating Conjunctions | after, although, as, as if, as long as, as soon as, as though, because, before, how, if, in order that, since, so that, than, though, unless, until, when, whenever, where, wherever, whether, while |
| Noun Clause | is a subordinate clause that is used as a noun |
| Common Introductory Words for Noun Clauses | how, that, what, whatever, when, whether, which, who, whoever, whom, whomever, why |