Irregular verbs

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Across
  1. 2. The past of the verb "swim"
  2. 4. The past of the verb "drink"
  3. 7. The past of the verb "fly"
  4. 9. The past of the verb "run"
  5. 11. The past of the verb "go"
  6. 12. The past of the verb "do"
  7. 14. The past of the verb "sleep"
Down
  1. 1. The past of the verb "have"
  2. 3. The past of the verb "win"
  3. 5. The past of the verb "eat"
  4. 6. The past of the verb "sing"
  5. 8. The past of the verb "write"
  6. 10. The past of the verb "read"
  7. 12. The past of the verb "drive"
  8. 13. The past of the verb "cut"