knock
第三人称
knocks
现在进行时
knocking
过去式
knocked
过去完成时
knocked
1
敲, 打
to hit a door, surface, etc. in a way to attract attention, especially expecting it to be opened
- She had to knock on the door to announce her arrival.
她不得不敲门来宣布她的到来。
- The neighbor decided to knock on the door to return the borrowed sugar.
邻居决定敲门归还借来的糖。
- In the middle of the night, a mysterious sound made her nervous, so she cautiously knocked on her roommate's door.
在半夜，一个神秘的声音让她感到紧张，所以她小心翼翼地敲了敲室友的门。
- Before entering the office, it's polite to knock on the door to ensure you're not interrupting a meeting.
进入办公室前，礼貌地敲门以确保您没有打断会议。
- The friend didn't have a phone, so she had to knock on the window to get the homeowner's attention.
朋友没有电话，所以她不得不敲窗户来引起房主的注意。
2
敲, 撞
to hit or strike with force, often accidentally
及物动词
- The child knocked his knee against the edge of the coffee table.
孩子把膝盖撞到了咖啡桌的边缘。
- She knocked her head on the low ceiling while going up the stairs.
她上楼时头撞到了低矮的天花板。
- He knocked his elbow against the doorframe while rushing out of the room.
他匆忙离开房间时，肘部撞到了门框。
- He knocked his head on the low doorway while entering the room.
他进入房间时头撞到了低矮的门框。
同义词：
3
敲, 撞倒
to hit an object with enough intensity to cause it to shift or topple
及物动词
- He knocked the glass off the table accidentally.
他不小心把玻璃杯从桌子上碰掉了。
- She knocked the book off the shelf while reaching for another.
她在伸手拿另一本书时碰掉了书架上的书。
- The cat knocked the vase off the counter while playing.
猫在玩耍时把花瓶从柜台上撞了下来。
- The cat knocked the vase off the shelf while playing.
猫在玩耍时把花瓶从架子上撞了下来。
4
敲, 打
to strike something with force, resulting in a sharp, audible sound
及物动词
- She knocked the nail into the wall with a hammer.
她用锤子把钉子敲进了墙里。
- The boxer knocked his opponent out of the ring with a powerful punch.
拳击手用一记有力的拳头将对手击出了擂台。
- He knocked the ball out of the park with his swing.
他用他的挥杆把球打出了公园。
- The carpenter knocked the wooden plank into place.
木匠把木板敲到位。
同义词：
5
批评, 指责
to express disapproval or point out shortcomings in someone or something
及物动词
- The film critic knocked the movie for its lack of character development.
电影评论家批评这部电影缺乏角色发展。
- She always seems to knock his choice of clothes, no matter what he wears.
无论他穿什么，她似乎总是批评他的衣服选择。
- The teacher knocked the student's essay for its lack of structure and clarity.
老师批评了学生的文章，因为其缺乏结构和清晰度。
- It's easy to knock his artwork, but you have to appreciate his unique style.
批评他的艺术作品很容易，但你必须欣赏他独特的风格。
- The journalist knocked the politician's speech as being vague and lacking substance.
记者批评政治家的演讲含糊不清，缺乏实质内容。
反义词：
6
敲击, 爆震
(of an engine) produce a sharp, metallic noise caused by the premature or uneven ignition of the air-fuel mixture
- The engine started to knock loudly after using low-quality fuel.
使用低质量燃油后，发动机开始大声敲击。
- Driving uphill with a heavy load can cause the engine to knock if not properly tuned.
如果调整不当，载重上坡行驶会导致发动机爆震。
- High levels of carbon deposits in the cylinders can cause the engine to knock.
气缸内高水平的积碳会导致发动机爆震。
- The turbocharger malfunctioned, causing the engine to knock under load.
涡轮增压器发生故障，导致发动机在负载下爆震。