1. The proper noun <em>Jerry</em> is the appositive of the sentence, and it has the function of <em>adding more information about 'My brother'</em>
2. The noun phrase <em>"the girl from the city"</em> is the appositive phrase; it <em>describes something about 'My friend' </em>, a little extra information that doesn't alter the meaning of the sentence if it is excluded.
1. My brother, Jerry, is now going to France. The appositive is Jerry. 2. My friend, the girl from the city, visited me for a week. The appositive phrase is the girl from the city. Usually appositives and appositive phrases are separated from the rest of the sentence using commas.