Respuesta :
The - article adj
Bill - SN
Must be paid - verb phrase
By - preposition
Whoever purchased the lumber - noun clause obj of the preposition
Answer: Explanation:
The sentence "The bill must be paid by whoever purchased the lumber" is written in the Passive Voice, in which the subject receives the action of the verb.
Subject: The bill
Predicate nominative/noun: paid (after linking verb)
Direct Object of Verb: the lumber (verb purchased)
Object of Preposition: whoever (preposition by)