Change the verb into the correct form:
1. By midnight, you (dance) for 4 hours.
2. By dinner, she (cook) the whole afternoon.
3. He (work) there for 10 years by 2015.
4. By next year, I (study) English for 7 years.
5. By next week, we (renovate) for over a month.
6. In 2012, they (live) here for 4 years.
7. Before December, Barbara (teach) for a year.
8. By this time tomorrow, I (do) this exercise for a long time.
9. Jessica (help) them for 12 months.
10. Bob and Sarah (cook) for 2 hours at 8 o'clock.
11. Tomorrow at 9 o'clock I (sleep) for 10 hours.
12. On Thursday, I (fix) the car for a whole month!
13. In 10 minutes, James (wait) for 2 hours.
14. They (stand) for a whole day.
15. By this time next week, we (vacation) for a month.