A noun phrase is a group of words that functions as a noun in a sentence. It typically includes a noun and any modifiers, such as adjectives, articles, and possessive pronouns.

Here are some examples of noun phrases:

• The tall tree (noun: “tree”; modifier: “tall”)
• My sister’s car (noun: “car”; modifier: “my sister’s”)
• A happy dog (noun: “dog”; modifier: “happy”)
• The green grass (noun: “grass”; modifier: “green”)

In each of these examples, the noun phrase is acting as the subject of the sentence or the object of a verb or preposition. The noun in the phrase is the main focus of the phrase, and the modifiers provide additional information about the noun.