The past perfect tense is had borne.
The past tense of bear is bore.
The past perfect tense of hope is had hoped.
"Had been" is the past perfect tense of be.
The past perfect tense is had broken.
The past perfect tense is had met.
The past perfect tense of choose is had chosen.
If someone where to say "I bear a burden" the past perfect tense of "bear" would be "I bore a burden."
Existed is the past tense. The past perfect tense is had existed.
The past tense of bear is bore.
The past tense is bled, and the past perfect tense is had bled.
The past tense of sit is sat; the past perfect tense is had sat.
The past tense of the verb to bear is bore.
The past perfect tense of hope is had hoped.
The past perfect tense is had set.
The past perfect tense is had submitted.
The past perfect tense is "had confronted".
The past perfect tense is had rung.