recognize和know

请先看下面一道动词误用解析题: 你认识张先生有多久了? 误:How long have you recognized Mr Zhang? 正:How long have you known Mr Zhang? 析:recognize作“认识”解时,是非延续性动词,不能与表示一段时间的状语连用;know作“认识”解时,是延续性动词,可以与表示一段时间的状语连用。