Irregular verbs (3. Stammform)

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Across
  1. 4. drive
  2. 6. do
  3. 9. be
  4. 10. shake
  5. 11. become
  6. 13. think
  7. 15. sing
  8. 16. speak
  9. 18. write
  10. 20. dig
Down
  1. 1. say
  2. 2. ride
  3. 3. understand
  4. 5. see
  5. 7. make
  6. 8. keep
  7. 11. bring
  8. 12. choose
  9. 14. wake
  10. 16. shoot
  11. 17. swim
  12. 19. tell