To create the past perfect progressive, on needs the auxiliary verbs had & been and a present participle. Present participles always ending in -ing.
The verb run in the past perfect progressive is had been running.
present perfect progressive
The past perfect progressive tense of "to investigate" is "had been investigating."
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
Past progressive tense.
The past progressive of "think" is "was thinking" or "were thinking." The past perfect of "see" is "had seen."
the form of the past tense are past progressive,past perfect progressive,past perfect simple.
Present: show, Past: showed, Future: will show, Present Continuous: is showing, Present Perfect: has shown, Present Perfect Continuous: has been showing, Past Continuous: was showing, Past Perfect: had shown, Past Perfect Continuous: had been showing, Future Continuous: will be showing, Future Perfect: will have shown, Future Perfect Continuous: will have been showing.
Yes, had been cleaning is the past perfect progressive tense of clean.
The past progressive (past continuous) is "was visiting." (were visiting) The past perfect progressive is "had been visiting."
Present perfect progressive - have been abiding. Past perfect progressive - had been abiding. Future perfect progressive - will have been abiding.
The past perfect progressive tense of "clean" is "had been cleaning."
The five progressive tenses in English are: present progressive (e.g., I am eating), past progressive (e.g., She was watching), future progressive (e.g., They will be sleeping), present perfect progressive (e.g., We have been studying), and past perfect progressive (e.g., He had been working).