1. I __________ (to work) on this project for three months now.
  2. She __________ (to wait) for you since 2 PM.
  3. We __________ (to look) for our cat since yesterday.
  4. He __________ (to study) English for over a year.
  5. The children __________ (to play) outside for hours.
  6. It __________ (to rain) since early morning.
  7. My friends __________ (to try) to fix the car all day.
  8. They __________ (to travel) around South America for the last six months.
  9. I __________ (to not feel) well for several weeks.
  10. The company __________ (to develop) a new software since last April.
  11. Our dog __________ (to bark) non-stop for the past hour.
  12. She __________ (to learn) to play the piano since she was five.
  13. The garden __________ (to grow) wildly since we stopped maintaining it.
  14. We __________ (to argue) about this issue for too long.
  15. He __________ (to jog) every morning for the past month.
  16. I __________ (to think) about changing my job for a while now.
  17. The scientists __________ (to research) this topic for decades.
  18. You __________ (to use) the computer non-stop since you woke up.
  19. They __________ (to renovate) their house since last year.
  20. My sister __________ (to plan) her wedding for the past three months.