Each part of speech explains not what the word is, but how the word is used. In fact, the same word can be a noun in one sentence and a verb or adjective in the next. The next few examples show how a word’s part of speech can change from one sentence to the next, and following them is a series of sections on the individual parts of speech, followed by an exercise.
Books are made of ink, paper, and glue.
In this sentence, “books” is a noun, the subject of the sentence.
Deborah waits patiently while Bridget books the tickets.
Here “books” is a verb, and its subject is “Bridget.”
We walk down the street.
In this sentence, “walk” is a verb, and its subject is the pronoun “we.”
The mail carrier stood on the walk.
In this example, “walk” is a noun, which is part of a prepositional phrase describing where the mail carrier stood.