He held the knife by its blade.

他握住了刀刃。

《柯林斯英汉双解大词典》

He sheathed the knife and strapped it to his shin.

他将刀插入鞘中，绑在小腿上。

《柯林斯英汉双解大词典》

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。

《牛津词典》

He could not kill the dog, because he could not hold his knife.

VOA: special.2010.05.01

Dudley offered a prayer, he told the boy his time had come, and he killed him with a pen knife, stabbing him in the jugular vein.

达德利为派克做了祷告，并告诉派克他的时辰到了，然后就用小刀割破他的颈静脉杀死了他。

耶鲁公开课 - 公正课程节选

So in the story Dudley is there, pen knife in hand, but instead of the prayer or before the prayer, he says "Parker, would you mind?"

故事里达德利手拿小刀，没有做祷告，或是在做祷告前，他说，派克，介意我们杀你吗“

耶鲁公开课 - 公正课程节选

He was holding a knife in his hand and he was wearing a mask.

BBC: Elswick knifepoint rapist Abdul Miah jailed for 12 years

Mr Doyle told the court that he tried to grab the knife, but as he did so she pushed forward causing him to use his left hand on her throat to restrain her.

BBC: Sian Rees murder: John Doyle admits 'causing death'

He still occasionally blacksmiths in a little tin shed on the Patagonia campus, and he showed me his latest project, a metal mussel knife that he's been beating into perfect shape sharp at the blade to pry open the shells, blunt at the handle to knock away the barnacles.

WSJ: Patagonia's Founder is America's Most Unlikely Business Guru