Irregular past tense verbs

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Across
  1. 4. past tense of catch
  2. 6. past tense of buy
  3. 8. past tense of hear
  4. 10. past tense of build
  5. 11. past tense of speak
  6. 13. past tense of think
  7. 14. past tense of be
  8. 16. past tense of make
Down
  1. 1. past tense of teach
  2. 2. past tense of bring
  3. 3. past tense of have
  4. 5. past tense of tell
  5. 7. past tense of go
  6. 9. past tense of cut
  7. 12. past tense of put
  8. 14. past tense of write
  9. 15. past tense of say