Having been laid up for many years with paralysis for many years,he lost all hope of recovery.为什么要用Having been laid up不用
问题描述：
Having been laid up for many years with paralysis for many years,he lost all hope of recovery.为什么要用Having been laid up不用Having laid up?卧床不起跟逻辑主语有被动的关系么?
be laid up是固定搭配吧?
答
是主动吧,那个是分词形式哦!