The past perfect tense is had cleaned.
The past perfect progressive tense of "clean" is "had been cleaning."
Existed is the past tense. The past perfect tense is had existed.
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.
had been cleaningExample: When I asked my little boy why he was in the bathroom for so long, he said he had been cleaning the windows!
Clean is not past perfect. It's present simple. The past perfect tense of clean is had cleaned.
The past perfect progressive tense of "clean" is "had been cleaning."
Yes, had been cleaning is the past perfect progressive tense of clean.
Existed is the past tense. The past perfect tense is had existed.
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.
Clean is not past tense, it's present tense. The past tense is cleaned.
had been cleaningExample: When I asked my little boy why he was in the bathroom for so long, he said he had been cleaning the windows!
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".