What are verb pairs?

• Объекты 1
  • write
  • buy
  • give
  • come
  • sleep
  • win
  • take
  • meet
  • swim
  • do
• Объекты 2
  • wrote
  • bought
  • gave
  • came
  • slept
  • won
  • took
  • met
  • swam
  • did