Identify the underlined phrase in the sentence. After several minutes, I finally located my car keys.

The underlined phrase in the sentence is "located my car keys."

The underlined phrase in the sentence is "located my car keys".

To identify the underlined phrase in the sentence "After several minutes, I finally located my car keys," follow these steps:

1. Locate the underlined portion in the sentence: "After several minutes, I finally located my car keys."
2. The underlined phrase is "After several minutes."

The underlined phrase in the sentence is a prepositional phrase. It begins with the preposition "After" and is followed by the noun phrase "several minutes," which functions as the object of the preposition. This prepositional phrase functions as an adverbial phrase, providing information about when the action of the main clause (the act of locating my car keys) occurred.