Appositive Phrases

Appositive Phrase-an appositive phrase renames the noun that comes directly in front of it. All appositive phrases function as nouns in the sentence, but they can be a regular noun phrase, or a gerund or infinitive phrase.
Example: Joe's dog, a black lab, is named Sam. The appositive (a noun phrase) renames dog.
My mom's job, teaching school, seems like a lot of work. The appositive (a gerund phrase) renames job.
My dream, to go to the moon, might never happen. The appositive (an infinitive phrase) renames dream.