他抓住儿子的肩膀把他拉了起来。

He pulled his son up ___by the shoulder.

警官牵着那个迷路孩子的手领着他走。

The officer led the lost child ___by the hand.

她拽着电线的插头把它拔了下来。

She yanked the cord ___by its plug to disconnect it.