jerk: stresses suddenness and abruptness, and may imply a movement both graceless AND forceful: gave the dog's leash a quick ~.


snap: a sharp quick action that is abruptly terminated, as in biting, seizing, or breaking: the crododile ~ at the child but missed.


twitch: applies to a quick, light and spasmodic movement that oft. combines tugging and jerking: the sleeping cat, its body ~ as it dreamt.


yank: a quick and heavy pulling and tugging:～ bedcloth over his head.


生词tug: 猛拉，拽 : I felt a tug at my sleeve. 我感到袖子被拽了一下。


jerk: 强调突然用力的动作, snap: 强调突然停止的一下动作, 如抓咬折断, twitch: 轻快间歇的动作（还表示猛地拉动tug & jerk） yank: 快速用力的拉拽。


记忆方法：1） 首字母联想SJTY: 使劲推呀。

          2）猛拽的意思是突然地动作mean to make a sudden sharp quick movement.