新视野大学英语上一个句子,求语法unit 5上There are large advertisment signs directed at them both:the tough,confident,or fashionable older man,the beautiful,"worldly"young woman,both dragging away.为何direct不用ing明显是主动啊

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新视野大学英语上一个句子,求语法
unit 5上There are large advertisment signs directed at them both:the tough,confident,or fashionable older man,the beautiful,"worldly"young woman,both dragging away.为何direct不用ing明显是主动啊,灰常不解,求语法,

direct sth at sth 把...对准
在这里就是 direct the advertisment signs at them both...
所以,当advertisment signs 作主语时,用被动语态

结合语境是这样用的,这是说广告上显示的嘛,类似于描述通知时的用法。