The past perfect progressive tense of work is "had been working".
work done
The past perfect progressive tense of work is "had been working".
Past progressive tense.
The past progressive (past continuous) is "was visiting." (were visiting) The past perfect progressive is "had been visiting."
There are two types:Past progressive tensePast perfect progressive tense
The past progressive tense of study is:I/He/She/It was studying.You/We/They were studying.
The past progressive of think is was/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.
Was/were starting is the past progressive tense of start.
Present progressive, past progressive, and future progressive
Past simple - I laughed. Past progressive - I was laughing.
The past perfect progressive of investigate is had been investigating.