The Past Perfect Continuous shows how long an action had been in progress before a later moment in the past, or explains the cause of a past situation.
How to form the Past Perfect Continuous
| Type | Pattern | Example |
|---|---|---|
| Affirmative | subject + had been + verb-ing | I had been waiting. · They had been working. |
| Negative | subject + had not been + verb-ing | She hadn't been sleeping. |
| Question | Had + subject + been + verb-ing? | How long had you been waiting? |
When to use the Past Perfect Continuous
- Duration before a past moment: She had been studying for three hours when he called.
- The cause of a past result: His eyes were red because he had been crying.
Signal words
These words often show that the Past Perfect Continuous is needed: for, since, how long, before, until, by the time, all day.
Examples
- I had been waiting for an hour when the bus came.
- They had been arguing before we arrived.
- She was out of breath because she had been running.
- How long had he been working there?
- It had been snowing all night.
- We hadn't been paying attention.
Common mistakes
- Using it with stative verbs: I had been knowing → I had known.
- Forgetting been: I had waiting → I had been waiting.
Frequently asked questions
Past Perfect or Past Perfect Continuous?
Use the continuous to stress duration or an unfinished activity (I had been painting), and the simple form for a completed result (I had painted the room).