knives的單數是什麼

knives的單數是:  knife

You are welcome to the loan of my knife .你可隨意借用我的小刀。

She told him the knives weren't sharp .她告訴他，這些刀都太鈍。

The knife fell from her nerveless fingers .刀子從她那無力的手指中落下。

With a nasty grin on his face he took out a knife .他獰笑着掏出了刀子。

The butcher's knife cut cleanly through the meat .屠夫的刀利落地切着肉。

The knives and forks set up their regular jingle .刀叉發出常有的叮噹聲。

The mugger thrust at his victim with a knife .搶劫者用刀子向受害人刺去。