the prepositional phrase

A prepositional phrase begins with a preposition and usually ends with a
noun or a pronoun.

The prepositional phrase is underlined in each sentence.
The elderly man went to the doctor’s office today.
In the morning, the elementary school students perform their exercises.
These magicians performed many tricks for the children.
Tomas walked into the dark house.

The word that ends the prepositional phrase is the object of the preposition.

In each of these sentences, the prepositional phrases are underlined, and
the objects of the preposition are italicized.
All of the trees had been pruned by the workers.
Someone in this office has borrowed the stapler from Markisha.
Will you show your necklace to your grandparents?