Irregular verbs

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Across
  1. 4. Build
  2. 5. Write
  3. 7. Give
  4. 9. Get
  5. 12. Sleep
  6. 14. Sit
  7. 15. Say
  8. 16. Pay
  9. 19. Run
  10. 21. Think
  11. 24. Know
  12. 25. Make
  13. 26. See
  14. 28. Understand
  15. 29. Do
Down
  1. 1. Buy
  2. 2. Sell
  3. 3. Fly
  4. 6. Teach
  5. 8. Go
  6. 10. Have
  7. 11. Catch
  8. 13. Learn
  9. 15. Speak
  10. 17. Drink
  11. 18. Begin
  12. 20. Come
  13. 22. Find
  14. 23. Be
  15. 27. Eat