Past Perfect Progressive Tense
We use the Past Perfect Continuous Tense to talk about duration of an action in the past.
Forming Past Perfect Continuous Tense
Subject + had + been + verb(ing)...
I had been studying English.
Subject + hadn't + been + verb(ing)...
I hadn't been living in poverty.
Had + subject + been + verb(ing)...?
Had she been sleeping?
Hadn't + subject + been + verb(ing)...
Hadn't they been waiting for you?
|I had been walking||we had been walking|
|you had been walking||you had been walking|
|he/she/it had been walking||they had been walking|
|I had been sleeping||we had been sleeping|
|you had been sleeping||you had been sleeping|
|he/she/it had been sleeping||they had been sleeping|
|There is no past perfect progressive for the "to be" verb. "Had been being" is expressed simply as "had been": "We had been |
a. The old man had been sleeping on the corner until you came.
b. I had been practicing the violin before my dad arrived.
c. How long had you been learning English before you moved to USA?
d. The students had been waiting for the results until yesterday.
e. Henry had been watching TV before you called him.