Irregular 'Yo' Form Cross World Puzzle!

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Across
  1. 4. Irregular yo form of 'Ir'
  2. 5. Irregular yo form of 'Saber'
  3. 6. Irregular yo form of 'Venir'
  4. 7. Irregular yo form of 'Ver'
  5. 8. Irregular yo form of 'Tener'
Down
  1. 1. Irregular yo form of 'Hacer'
  2. 2. Irregular yo form of 'Ser'
  3. 3. Irregular yo form of 'Estar'
  4. 5. Irregular yo form of 'Poner'