knock

复数：knocks过去式：knocked过去分词：knocked现在分词：knocking第三人称单数：knocks

1. [C]短促的敲打(声) (sound of) a sharp blow
2. [C]爆震声 (in an engine) sound of knocking
3. [C](板球赛的)一局 (in cricket) innings
4. [C]一件倒霉事或麻烦事 a piece of bad luck or trouble

1. vt. & vi. 敲,击,打 hit or strike
2. vt. 批评,数落,非难 say critical or insulting things about sb/sth

• get the knock被解雇,遭到失败
• hear a knock听到敲门声
• receive a knock受到挫折
• stand the knock忍受指责
• take a knock受到严重损失

• gentle knock轻轻的敲门声
• loud knock重重的敲门声
• good knock打一局好球
• first knock第一局球
• bad knock损失不少钱财
• damaging knock破坏性的挫折
• hard knock沉重的打击

• engine knock发动机的爆震声

• knock a ball拍球
• knock colds消除感冒
• knock head撞头
• knock sb's hometown抨击某人的家乡
• knock sb's play抨击某人的戏剧
• knock such notions给人以深刻的观念
• knock the ash敲烟灰
• knock the bottom of the box敲箱子底
• knock the dust敲打灰尘
• knock the England team挖苦英格兰队
• knock the foreign policy抨击外交政策
• knock the furniture碰倒家具
• knock the glass打破玻璃
• knock the nail钉钉子
• knock the price降价
• knock the wall拆墙
• knock the worry摆脱忧愁

• knock badly剧烈撞击
• knock loudly发出大声地碰撞
• knock about〔around〕流浪
• knock down撞倒,拆除,挣(钱)
• knock down a machine把机器拆卸开来
• knock down a plane击落飞机
• knock down an A in history历史考得优等分数
• knock down good money挣很多钱
• knock down some cash偷一些现金
• knock off停止工作,完成,结束,快速写
• knock off a few lines匆匆写几句
• knock off work歇工
• knock out击倒,使昏迷或入睡,彻底击败
• knock out the enemy guards干掉敌人哨兵
• knock oneself out to get through the difficulty竭尽全力渡过困难
• knock oneself out preparing for the experiment努力为实验做好准备
• knock oneself out with excessive work过度工作而筋疲力尽
• knock over打翻,轻易击败
• knock over a lamp打翻一盏灯
• knock up击打,草率或匆忙地作出
• knock up a meal匆匆做好一餐饭

• knock against偶然碰到
• knock at a door敲门
• knock into将…击打进或撞进,偶然碰到
• knock into the old teacher偶然碰到那位老教师
• knock sb off sb's feet把某人打倒在地
• knock on the door敲门
• knock sb on the head打某人的头
• knock sth on the head破坏某事
• knock sth to pieces把某物打碎
• knock with a bat用球拍打

knock on撞击撞出；敲击（门、窗）

knock at敲（门、窗等）

knock off击倒；停工；中断

knock down击倒；拆卸

knock at the door敲门；把……撞倒；撞墙

knock out敲空；击倒；打破；使筋疲力竭

knock it off停止做；住口，别再讲下去了

knock on the door敲门

knock over打翻；撞倒

knock in（把钉子）钉入

knock on wood敲木头，企求好运；吉人天相

knock up敲门唤醒；[英口]筋疲力尽；往上敲

knock back（摇把）反击，（活塞）逆行，（曲轴）反转；反座；回击，击退；使...大吃一惊

knock against撞击，与…冲突；偶然遇见

knock sensor爆振传感器；进气流量传感器

knock into撞上；与…相撞

knock off work敲落工作；歇工

1. Someone is knocking at the door.
   有人在敲门。
2. One may knock to signal one's presence to others.
   可以用敲击发出的声音向别人表明自己的存在。
3. He knocked a big hole in the wall.
   他把墙撞出了一个大洞。
4. I am so hurried as to knock into my teacher.
   我如此匆忙以至于撞到老师身上。
5. The man is knock down by the bicycle.
   这个男人被自行车撞倒了。
6. She knocked the bottom out of our argument.
   她把我们的论点驳得体无完肤。

1. There was a knock at the window.
   有人敲了一下窗户。
2. I heard footsteps, then a knock on the door.
   我听到脚步声，随后是敲门的声音。
3. There was no answer to my knock, so I went away.
   我敲门没人应，所以就走开了。
4. She took a bad knock when her husband died.
   丈夫的死,使她受到沉重的打击。
5. When I fall, I get a terrible knock on the head.
   我摔倒时头撞得很厉害。