Could you help me clarify 'were found' versus the past perfect tense, please?
From what I understand, the past perfect tense is composed of the auxiliary "had" (to have: in past simple tense, third person) and the past participle of the main verb. For example: "They had found".
Then I see "were found" (as in 'they were found') which is the simple past tense of "to be" (third person) and "found". In this case, is 'found' the past participle? Or, is it functioning as an adjective or something?
Can someone explain to me the difference?