irregular verbs

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Across
  1. 1. past of drink
  2. 4. past of see
  3. 5. past of drive
  4. 7. past of win
  5. 8. past of make
  6. 9. past of find
  7. 11. past of write
  8. 12. past of is
  9. 15. past of buy
  10. 17. past of draw
Down
  1. 1. past of do
  2. 2. past of know
  3. 3. past of swim
  4. 4. past of sing
  5. 6. past of begin
  6. 9. past of fly
  7. 10. past of lose
  8. 11. past of go
  9. 13. past of sell
  10. 14. past of cut
  11. 16. past of have
  12. 18. past of read