knock的用法：
knock的用法1：knock用作名词的基本意思是“狠狠的一击,打击”,用于比喻可指“不幸,挫折,艰苦”,引申可指“敲击声,敲击信号”。
knock的用法2：knock是抽象名词,但却可数,可加不定冠词修饰,也可用复数形式,表示复数概念。
knock的用法3：knock后接at〔to〕的介词短语表示侧重敲击的对象; 接on的介词短语侧重敲击的位置。
knock的用法4：knock的基本意思是用手、拳等硬物“敲打”,指出声地、连续地猛击,引申可指发出敲击或爆裂的声响。还可表示“批评”“数落”“非难”。
knock的用法5：knock可用作及物动词,也可用作不及物动词。用作及物动词时,可接名词或代词宾语,也可接以形容词充当补足语的复合宾语。可用于被动结构。
knock的用法6：knock是瞬间动词,如表示重复动作,须用进行体。
knock的常用短语：
knock about〔around〕1 (v.+adv.)
knock about〔around〕2 (v.+prep.)
knock about〔around〕 with (v.+adv.+prep.)
knock against (v.+prep.)
knock at (v.+prep.)
knock away (v.+adv.)
knock back (v.+adv.)
knock down (v.+adv.)
knock in1 (v.+adv.)
knock in2 (v.+prep.)
knock into (v.+prep.)
knock off1 (v.+adv.)
knock off2 (v.+prep.)
knock on1 (v.+adv.)
knock on2 (v.+prep.)
knock out (v.+adv.)
knock out of (v.+adv.+prep.)
knock over (v.+adv.)
knock through (v.+adv.)
knock的用法例句：
1. Find Bernie and get him to knock an agreement together.
找到伯尼，让他尽快拟好一份协议。
2. They decided to knock the two rooms into one.
他们决定把两间屋子打通连成一间。
3. What they said was a real knock to my self-confidence.
他们的话是对我自信心的一次重大打击。
4. He had many motives for wanting to knock off Yvonne.
他有很多杀伊冯娜的动机。
5. When we stop enjoying ourselves we'll knock it on the head.
等玩够了，我们就会结束。
6. They knock around on weekends in grubby sweaters and pants.
他们周末穿着邋遢的毛衫和裤子到处闲逛。
7. German cameras at knock-down prices flooded the British market.
德国产的廉价相机充斥着英国市场。
8. If I get this report finished I'll knock off early.
如果我写完这篇报告，我就会早点下班。
9. Could you possibly knock me up some scrambled eggs?
你能尽快给我弄个炒鸡蛋吗?
10. The market might abandon the stock, and knock down its price.
