Your school is choosing between cookery lessons and music lessons for all students. You have been asked to write a report for the Head Teacher. In your report you must:
• give two benefits of music lessons
• give two benefits of cookery lessons
• state which lessons you would prefer and give one reason why.
You must write between 100 and 150 words only

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.