Which of these sentences states an opinion? a) ulrich could guess the quarter from whence it came. b) the descending twig had slashed the skin of his face. c) assuredly there was a disturbing element in the forest. d) the neighbour feud had grown into a personal one since ulrich had come to be head of his family.

answer: the prince warns the 2 families that if they get into another fight they will be put to death

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.