Odpowiedź:
ZDANIA TWIERDZĄCE:
1. Tim has already seen a desert.
2. Alice has ridden a bicycle before.
3. Tony has recently been in the Middle East.
4. Tony has also saw the desert, just like Tim.
ZDANIA PRZECZĄCE:
1. Alice has never seen a desert before.
2. Tim hasn't ridden a bicycle yet.
3. Tony was never in Middle East before.
4. Alice has never got the chance to swim in a river.
