40 questions on using ‘for’ (duration) and ‘since’ (starting point) with Past Perfect Continuous. She had been waiting for 3 hours / since morning.
Choose 'for' or 'since' to complete each Past Perfect Continuous sentence. Remember: 'for' = duration (3 hours, years), 'since' = starting point (Monday, 2015, morning).
| for (duration) | since (starting point) |
|---|---|
| for 2 hours | since 3 p.m. |
| for 10 years | since 2014 |
| for a long time | since last Monday |
| for ages | since the accident |
| for three months | since she was a child |
✗ She had been working for since Monday. → ✓ She had been working since Monday.
✗ He had been studying since three hours. → ✓ He had been studying for three hours.