Ответ:

  1. If it snows, I'll take the children skiing.
  2. The football match will be cancelled if it rains.
  3. I won't go to the party unless Connie comes with me.
  4. If you run fast, you will win the race.
  5. Unless they work overtime, they won't earn enough money to go on holiday.
  6. Will Greg post this letter for me if I ask him?
  7. Unless you drive carefully, you'll have an accident.
  8. If someone does not water these plants, they will die.