What is a noun phrase?
A noun phrase is any series of words in a sentence that collectively functions as a noun. For instance, the sentence “My apartment has three windows” contains two noun phrases: “my apartment” and “three windows.”
A noun phrase contains at least one noun or pronoun and all the other words (e.g., determiners, articles, adjectives, prepositions) that modify it.
Noun phrases can be long and complex. For instance, in the sentence “The fact that I can’t attend your party tomorrow is regrettable,” the subject of the sentence is the long noun phrase “the fact that I can’t attend your party tomorrow.”