Monkeys are jumping very high among these trees нужно задать 2 специальных вопроса 2 альтернативных вопроса , 1 общий , и к подлежащему,

Monkeys are jumping very high among these trees.

Специальные:

1) Where are monkeys jumping very high?

2) What are monkeys doing among these trees?

Альтернативные:

1) Are monkeys or cats jumping very high among these trees?

2) Are monkeys jumping or sleeping very high among these trees?

Общий: Are monkeys jumping very high among these trees?

Вопрос к подлежащему: Who is jumping very high among these trees?

1 Monkeys aren't jumping very hight among the trees.
2 Are monkeys jumping very hight among the trees?