Expresiones de tiempo: ¿imperfecto o preterito?

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Across
  1. 4. one day
  2. 6. frequently
  3. 8. every night
  4. 10. hardly ever
  5. 13. last night
  6. 14. suddenly
  7. 15. all the time
  8. 17. every summer
  9. 18. one time
  10. 19. last year
  11. 22. a couple of times
  12. 23. on Tuesdays
  13. 24. every christmas
  14. 25. often
  15. 26. sometimes
Down
  1. 1. on the weekends
  2. 2. when I was young
  3. 3. every day
  4. 5. the day before yesterday
  5. 7. several times
  6. 9. last week
  7. 11. always
  8. 12. from time to time
  9. 14. as a child
  10. 16. while
  11. 20. yesterday
  12. 21. generally