knock

n.短促的敲打（声）；爆震声；敲击声；敲门（或窗等）声

vi.猛烈敲击；与某物相撞；撞到了桌子

vt.（心）怦怦跳；把…撞击成（某种状态）；批评

verb

门窗 at door/window

1. 敲；击
   to hit a door, etc. firmly in order to attract attention
   1. He knocked three times and waited.
      他敲了三下门就等着。
   2. Somebody was knocking on the window.
      有人在敲窗户。

击 hit

2. （常为无意地）碰，撞
   to hit sth, often by accident, with a short, hard blow
   1. Be careful you don't knock your head on this low beam.
      小心，别把头撞在这矮梁上。
   2. Her hand knocked against the glass.
      她的手碰了玻璃杯。
3. 把…撞击成（某种状态）
   to put sb/sth into a particular state by hitting them/it
   1. The blow knocked me flat.
      那一拳把我打倒在地。
   2. He was knocked senseless by the blow.
      他被一拳打得不省人事。
   3. She knocked my drink flying.
      她把我的饮料打翻了。
   4. The two rooms had been knocked into one (= the wall between them had been knocked down) .
      那两间屋子打通了，成为一间屋。
4. 打掉；敲动；打破
   to hit sth so that it moves or breaks
   1. He'd knocked over a glass of water.
      他打翻了一杯水。
   2. I knocked the nail into the wall.
      我把钉子钉进墙里。
   3. They had to knock the door down to get in.
      他们不得不破门而入。
   4. The boys were knocking (= kicking) a ball around in the back yard.
      男孩们在后院踢球玩儿。
   5. The criticism had knocked (= damaged) her self-esteem.
      这一批评伤了她的自尊心。
5. 打，凿（洞）
   to make a hole in sth by hitting it hard
   1. They managed to knock a hole in the wall.
      他们设法在墙上凿了个洞。

心；膝盖 of heart/knees

6. （心）怦怦跳；（膝盖）打哆嗦
   if your heart knocks , it beats hard; if your knees knock , they shake, for example from fear
   1. My heart was knocking wildly.
      我的心怦怦直跳。

发动机；管子 of engine/pipes

7. （尤指因故障）发碰撞声，嘭嘭作响
   to make a regular sound of metal hitting metal, especially because there is sth wrong

批评 criticize

8. （不公平地）批评；贬责；挑剔；非难
   to criticize sb/sth, especially when it happens unfairly
   1. The newspapers are always knocking the England team.
      报纸总是攻击英格兰队。
   2. ‘Plastics?’ ‘ Don't knock it ─there's a great future in plastics.’
      “塑料？”“别说它不好——塑料的前景大着呢。”

noun

门窗 at door/window

1. 敲击声；敲门（或窗等）声
   the sound of sb hitting a door, window, etc. with their hand or with sth hard to attract attention
   1. There was a knock on/at the door.
      有敲门声。

击 hit

2. 捶击；敲击；撞击
   a sharp blow from sth hard
   1. He got a nasty knock on the head.
      他头部遭到重重一击。

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

knock 敲，击

拟声词，敲打东西的声音。比较click,clock.

1. They came into the front hall, stamping their boots and jumping up and down to knock the snow off
   他们进入了前厅，跺着靴子，蹦跳着抖掉身上的雪。
2. She went directly to Simon's apartment and knocked on the door
   她直奔西蒙的房间，敲了敲门。
3. Knock at my window at eight o'clock and I'll be ready
   8点钟敲我的窗，我会准备好的。
4. He knocked before going in.
   他进去前先敲了敲门。
5. She accidentally knocked the tea tin off the shelf
   她不小心把架子上的茶叶罐碰了下来。
6. The baby was knocked from his father's arms
   婴儿被从他父亲的怀中撞落。
7. Isabel rose so abruptly that she knocked down her chair
   伊莎贝尔起得太急了，以致碰倒了她坐的椅子。
8. Buckets of roses had been knocked over.
   一桶桶的玫瑰被撞翻在地。
9. They decided to knock the two rooms into one
   他们决定把两间屋子打通连成一间。
10. The spacious kitchen was achieved by knocking together three small rooms.
    这个宽敞的厨房是由3个小屋子打通连成的。
11. The third wave was so strong it knocked me backwards
    第3波浪太大了，把我打了回去。
12. They were knocked to the ground and robbed of their wallets
    他们被打倒在地并被抢走了钱包。
13. Someone had knocked him unconscious.
    有人把他打昏了。
14. The stories of his links with the actress had knocked the fun out of him
    有关他与那位女演员有关系的传闻使他很不开心。
15. Those people hurt me and knocked my confidence.
    那些人既伤害了我的身体又打击了我的自信心。
16. His old truck, knocking and smoking, pulled down the road and out of sight.
    他那辆旧卡车一边冒着烟一边哐里哐啷地沿路向前驶去，直到驶出了视线。
17. I'm not knocking them: if they want to do it, it's up to them
    我不是批评他们：想不想做那件事取决于他们。
18. Never knock charter flights; they are opening up the world for budget-conscious travellers.
    绝不要挑剔包机航班；他们使精打细算的乘客能够去往世界各地。
19. 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。
20. The art market has suffered some severe knocks during the past two years.
    在过去的两年间，艺术品市场遭受了严重的打击。
21. Glamorous make-up is best reserved for days when you want to go all out to knock 'em dead.
    魅惑彩妆最好留到你竭力想把所有人都迷倒的时候。
22. Will you just knock it off!
    别闹了！
23. 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。
24. Any water-skiing enthusiast can knock up a pair of skis in a few hours.
    任何一个滑水爱好者都能在几小时内做成一副滑水橇。
25. There was a light knock at the door.
    有人在轻轻地敲门。
26. There had been a knock at the door and when she opened it she locked herself out
    外面有敲门声，她去开门，结果把自己反锁在了外面。
27. To his relief a loud knock on the door spared him from giving an explanation
    一声重重的敲门声让他松了一口气，他可以不用解释了。
28. Look out! Don't knock the stool over.
    哎，别把凳子碰倒了！
29. It's time to knock off.
    该收工了。
30. Can you knock this nail into the wood?
    你能把这钉子敲进木头里去吗？