1. She (play) tennis every weekend.

2. We (study) Spanish for two years now.

3. Last night, they (watch) a movie at home.

4. While I (clean) the house, my sister was listening to music.

5. By the end of the month, he (learn) how to cook lasagna.

6. The birds (chirp) outside every morning.

7. They (prepare) for the exam for weeks now.

8. The stars (twinkle) brightly in the night sky.

9. How often (you / practice) yoga?

10. How long (she / wait) for her appointment?

11. By the time we arrived, the children (play) outside for hours.

12. What (you / do) when the phone rang?

13. He (read) a novel since last week.

14. I (not / see) him at the party last night.

15. They (dance) at their wedding anniversary celebration.

16. My grandparents (live) in this neighborhood for over fifty years.

17. Who (win) the singing competition last month?

18. The train (already / leave) when we got to the station.

19. (you / hear) about the new restaurant downtown?

20. While she (study) for her exam, her phone rang.

1. plays

2. have been studying / 've been studying

3. watched / were watching

4. was cleaning

5. will have learned / 'll have learned / will have learnt / 'll have learnt

6. chirp

7. have been preparing / 've been preparing

8. twinkle

9. do you practice

10. has she been waiting

11. had been playing / 'd been playing

12. were you doing

13. has been reading / 's been reading

14. didn't see / did not see

15. danced / have been dancing / 've been dancing / had been dancing / 'd been dancing

16. have lived / have been living

17. won

18. had already left / 'd already left

19. Have you heard

20. was studying

"www.ejerciciosinglesonline.com"