Irregular verbs

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Across
  1. 3. simple past form of ,to think,
  2. 7. simple past form of ,to keep,
  3. 9. past participle form of ,to write,
  4. 10. simple past form of ,to stand,
  5. 11. the simple past form of ,to begin,
  6. 12. infinitive form of ,took,
  7. 13. simple past form of german word ,auswählen,
Down
  1. 1. infinitive form of ,fought,
  2. 2. past participle form of ,to buy,
  3. 4. past participle form of german word ,wissen,
  4. 5. ,,go ... gone,,
  5. 6. past participle form of german word ,verstehen,
  6. 8. past participle form of ,to feel,
  7. 10. past participle form of german word ,sehen,