The verb destroyed is in the past tense.
Destroyed is the past tense of destroy...therefore there is not a past tense for destroyed.
The past tense form is destroyed.
"To have destroyed" is the present perfect of "to destroy". For example: I have destroyed, he has destroyed.
The 'tense' of the verb is "past tense".
destroyed
destroyed
The past perfect tense of destroy is had destroyed.
I have destroyed
Destroyed
past: destroyed past perfect: I had destroyed past continuous: I was destroying
It's 'will destroy'.ex. in past tense: I destroyed the car.ex. in present tense: I am destroying the carex. in future tense: I willdestroy the car.
Yes, "were destroyed" is a verb phrase that functions as the verb in a sentence. It is in the past tense and indicates an action that occurred.