Spanish Two Flip Flop Verbs

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Across
  1. 2. The group where you add a "Y" in place for the second vowel
  2. 6. The verb to prefer in third person plural
  3. 7. The group that changes from O to U and I to E
  4. 8. The form that these changes take place
  5. 10. The verb to fall in third person singular
Down
  1. 1. The Verbs that change in the third person forms in preterit
  2. 3. The verb to read in third person plural
  3. 4. The verb to hurt in third person plural
  4. 5. The verb to sleep in third person singular
  5. 9. The verb to hear in third person singular