[ If he's had to correct her, guide her through the steps and still find that she's incapable of grasping what he's asking. It isn't Ben himself that's the crux of the issue. That interpretation creases the bridge of her nose as she casts him a glance over her shoulder, blatantly puzzled by the nature of his question. ]
I can't do what you're asking.
[ In her misunderstanding, she's resigned herself to that fact and assumed he had as well. ]
no subject
[ If he's had to correct her, guide her through the steps and still find that she's incapable of grasping what he's asking. It isn't Ben himself that's the crux of the issue. That interpretation creases the bridge of her nose as she casts him a glance over her shoulder, blatantly puzzled by the nature of his question. ]
I can't do what you're asking.
[ In her misunderstanding, she's resigned herself to that fact and assumed he had as well. ]