1. What have you (been
doing) these three months?
2. Our train starts late in the evening, so if
you (come) at seven o’clock, we will still (be packing) our luggage.
3. When
did you ( see) him last?
4. I ( met) him when he (was walking) across the
park.
5. Have you ever ( acted) on the stage? – Why, yes, that’s what I (have been
doing) for the last six years.