prevent 通常會接所有格形容詞 + 動名詞或接受詞 + from + 動名詞。當主詞沒有必要列出時，prevent 可以直接接動名詞，也可以接名詞。
舉例
- You can't prevent my leaving.
- You can't prevent me from leaving.
- I want to prevent his getting sick.
- I want to prevent him from getting sick.
- This campaign is designed to prevent drowning.
- Preventing stealing is our main goal this year.
- We are working to prevent forest fires.
- This vaccine will prevent malaria.