No, stop is present tense. The past perfect tense is had stopped.
The past perfect tense of "stop" is "had stopped."
The past tense of stop is stopped. The present tense of stop is stop.
Had stopped
The past tense of "exist" is "existed." The past perfect tense is "had existed."
The past perfect tense of hope is had hoped.
The past tense of "bleed" is "bled." The past perfect tense of "bleed" is "had bled."
The past tense of sit is sat. The past perfect tense of sit is had sat.
present tense past tense future tense present perfect tense past perfect tense future perfect tense present progressive tense past progressive tense future progressive tense present perfect progressive tense past perfect progressive tense future perfect progressive tense
The past perfect tense of 'get' is 'had gotten'
"Had been" is the past perfect tense of be.
The past perfect tense of "do" is "had done." For example, "She had done her homework before dinner."
Perfected is the past tense of perfect.