Irregular verbs

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Across
  1. 2. have
  2. 5. become
  3. 6. sell
  4. 8. drink
  5. 9. build
  6. 12. fall
  7. 14. cost
  8. 16. forget
  9. 17. buy
  10. 19. begin
  11. 20. take
  12. 21. sit
  13. 22. grow
Down
  1. 1. come
  2. 3. read
  3. 4. give
  4. 6. spend
  5. 7. write
  6. 10. understand
  7. 11. lose
  8. 13. leave
  9. 14. cut
  10. 15. find
  11. 18. go
  12. 21. swim