Today, my english teacher told me that any form of the verb "to be" is passive voice. I was always under the impression that "to be" verbs are usually linking verbs, but that they can also be passive voice. For example, she said in this sentence:
A time of great savagery in the world was World War II both in countries throughout the world and in concentration camps.
that "was" is passive voice. I thought this was a linking verb, with "time" being the subject and "of great savagery" and "in the world" being prespositional phrases acting as adjectives and "World War II" being the direct object.
Is she right or am I right?
Thanks in advance. I appreciate any help.