1楼不对啊
这个不是省略先行词的定语从句
rob很特殊
rob a person/bank 表示打劫 但没说明夺走什么
rob sb of sth 表示从谁手上抢走什么
rob him of all his possessions
(比喻用法)The accident robbed him of his health.
这里只是用get转化为一个被动的句型
She was robbed of her watch.
She got her watch robbed of.
就好像have sth done一样
She has her hair cut this morning.
只是动词的形式中有介词 就比如
She has the paper on the ground picked up.她让人把地上的纸捡了起来