这三个动词均可表示“需要”，大家注意是表示“需要”，其后接不定式和动名词均可，且意义可以相同，但是所有语态有所不同：接动名词时要用主动式表示被动含义，而接不定式时则要用被动形式表示被动含义。如：
The room needs cleaning.
=The room needs to be cleaned.
这房间需要打扫了。
[V -ing , V to inf] The plants want watering daily.
这些花草需要天天浇水。
The plants want to be watered daily.
这些花草需要天天浇水。
The windows wanted cleaning
窗户该擦了。
《柯林斯高阶英汉双解学习词典》
The windows wanted to be cleaned .
窗户该擦了。
Her hair wants cutting. = Her hair wants to be cut.
她该剪头发了。
《柯林斯高阶英汉双解学习词典》
Lentils do not require soaking before cooking.
