Regular and irregular verbs

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Across
  1. 1. : Past of see
  2. 3. : Past of run
  3. 4. : Past of play
  4. 6. : Past of clean
  5. 9. : Past of study
Down
  1. 2. : Past of work
  2. 5. : Past of eat
  3. 6. : Past of cook
  4. 7. : Past of go
  5. 8. : Past of come