What is the past perfect continuous?
The past perfect continuous is a past tense verb form used to describe actions that started in the past and continued until another point in the past. For example, “she had been running for an hour and was feeling exhausted.”
To form the past perfect continuous, place the auxiliary verbs “had” and “been” before the present participle (the “-ing” form) of the main verb (e.g., “They had been cooking”).
There are three other past tense forms: the simple past, past continuous (aka past progressive), and past perfect.