Past perfect continuous tense with

The formula for the past perfect continuous tense is had been + [present participle (root form of verb + -ing)].
Unlike the present perfect continuous, which indicates an action that began in the past and has continued up to the present, the past perfect continuous indicates something that began in the past, continued in the past, and also ended at a defined point in the past.
He had been drinking milk out the carton when Mom walked into the kitchen.
I had been working at the company for five years when I got the promotion.
When, for, since, and before are words that you may see used alongside the past perfect continuous tense. learn more with ‪@speaksmart‬
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