PRESENT PERFECT CONTINUOUS

1. The farmer (plant) trees for two months now.
2. She (sleep) since this morning.
3. He (teach) for seven years now.
4. She (swim) for hours now.
5. They (hope) for his returning since last week.
6. I (wait) for twenty minutes.
7. They (go out) together since last June.
8. We (do) some exercises.
9. I (wait) for ages.
10. Robert (learn) English for eight years.