want to be done与want doing所表达的意思完全一样都是某人或某物需要怎么样.
例如,房子需要粉刷,The house wants painting / to be painted
孩子需要照看 The baby wants to be looked after/ looking after .
也就说,want 当需要讲时,用动词不定式的被动式表示被动,用动词ing 形式的主动式表示被动含义.