It's a waste of time your talking to him?为什么使用your
如题.It 做后面从句的形式主语,从句中的your为什么不用you.
变成you以后,即you talking to him.
talking是talk 的动名词,可以看成是you talk to him
而用your的话,就成了your talk to him .
所以我有困惑,