Irregular verbs 1

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Across
  1. 1. past of 'build'
  2. 4. past of 'drive'
  3. 5. past of 'have'
  4. 6. past of 'go'
Down
  1. 1. past of 'become'
  2. 2. past of 'do'
  3. 3. past of 'buy'