刀的英文为knife，其复数形式是变f为v在加s，即knives。knife可作名词和及物动词两种词性，作为名词时，含义为“刀”；作为及物动词时，含义为“用刀伤害”、“用刀杀害”。
knife的中文含义及用法介绍
1、作为名词时，意为刀。
例句：She was murdered in a frenzied knife attack.
她被乱刀残杀。
Kelly was about to go under the knife when her surgeon stopped everything.
凯莉的手术就要开始时被她的外科医生给叫停了。
Score the card first with a knife.
先用刀在卡片上划出痕迹。
The deliberate cruelty of his words cut her like a knife.
他故意说的残酷无情的话对她像刀割一样。
He pierced another hole in his belt with his knife.
他用刀子在皮腰带上又扎了一个洞。
She was playing with a knife, so I took it off her.
她在玩一把刀子，于是我把刀子从她手里夺了过来。
They used their knives to clear a path through the dense undergrowth.
他们用刀在浓密的灌木丛中劈开一条小路。
All our officers are trained to defend themselves against knife attacks.
我们所有的警察都接受过自卫训练，能够对付持刀袭击。
He dropped the knife and it clattered on the stone floor.
他一失手，刀子当啷一声掉到石头地面上。
2、作为及物动词时，意为用刀伤害(或杀害)。
例句：Dawson takes revenge on the man by knifing him to death...
道森用刀杀死了他的仇人。
