Краткое пояснение: Чтобы составить отрицательное предложение, нужно добавить отрицательную частицу "not" после вспомогательного глагола или использовать отрицательные местоимения.
1) Mary has got some toys.
- Mary has got any toys.
- Mary hasn't got any toys.
2) There is some water.
- There isn't any water.
- There is no water.
3) There are some plums.
- There aren't any plums.
- There are no plums.
4) We have some rabbits.
- We don't have any rabbits.
- We have no rabbits.
5) They want to buy some fruit.
- They don't want to buy any fruit.
6) There were some mushrooms.
- There weren't any mushrooms.
- There were no mushrooms.
Ответ: See above