An Appositive Can Be a Noun, a Noun Phrase, or Noun Clause
An appositive can be a noun, a noun phrase, or a noun clause. For example:
• The beast, a lion, was starting to show interest in our party.
(In this example, the appositive is a noun.)
• The beast, a large lion with a mane like a bonfire, was starting to show interest in our party.
(In this example, the appositive is a noun phrase.)
• The beast, a large lion with a mane like a bonfire which was looking hungry, was starting to show interest in our party.
(In this example, the appositive is a noun clause.)