irregular verbs

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Across
  1. 1. what is the simple of buy
  2. 6. what is the past simple of write
  3. 7. what is the past simple of ride
  4. 8. what is the past simple of find
  5. 9. what is the past simple of fall
  6. 10. what is the past simple of do
  7. 11. what is the simple of break
  8. 12. what is the past simple of sell
  9. 13. what is the past simple of win
Down
  1. 2. what is the past simple of understand
  2. 3. what is the past simple of drik
  3. 4. what is the past simple of can
  4. 5. what is the past simple of hear
  5. 9. what is the past simple of fly
  6. 12. what is the simple of see