Ответ:

  1. buy → buys
  2. come → comes
  3. cry → cries
  4. dance → dances
  5. do → does
  6. drink → drinks
  7. eat → eats
  8. finish → finishes
  9. fly → flies
  10. go → goes
  11. get → gets
  12. have → has
  13. play → plays
  14. wash → washes
  15. watch → watches