| Words introducing adverb clauses |
| Subordinating conjunctions: after, although, as, as if, because, before, even though, if, in order that, since, so that, than, that, though, unless, until, when, where, whether, while |
| Words introducing adjective clauses |
| Relative pronouns: that, which, who, whom, whose Relative adverbs: when, where, why |
| Words introducing noun clauses |
| Relative pronouns: that, which, who, whom, whose Other pronouns: what, whatever, whichever, whoever, whomever Other subordinating words: how, if, when, whenever, where, wherever, whether, why |