Why is structure important to a play or story?

Structure is extremely important for a story, play, and many more things. Structure provides a backbone for the plot, setting, characters and all elements of the story. Simply put, structure is the glue of a story and what puts everything together to make sense. Without structure, the story or play will be hard for readers to understand and will make it difficult to convey emotions and feel of the story/play.

Explanation:

the answer is:

when will (v) the books (n) be (v) due?

nouns refer to people (other than pronouns), places and things, whereas verbs describe actions and are usually part of the predicate of a sentence. finally, pronouns can work as nouns and identify the participants in speech.

in the example sentence, "will" is a verb part or auxiliary verb, "be" is an infinitive verb and "books" is a plural noun.