1
clack (intransitive)
不及物用法，主语发出噼啪声。
The wooden floorboards clacked as she walked.
她走路时木地板噼啪作响。
发出咔嗒声；使发出咔嗒声
clacked — past of clack
先理解核心含义，再看它在真实句子里的用法。
发出咔嗒声；使发出咔嗒声
to make a sudden short sharp noise, or to cause something to make such a noise
The wooden floorboards clacked as she walked.
她走路时木地板噼啪作响。
发出短促尖锐的声响或一连串响声；发咔嗒声
To make a sudden, sharp noise, or succession of noises; to click.
使发出短促尖锐的声响或一连串响声；使发咔嗒声
To cause to make a sudden, sharp noise, or succession of noises; to click.
喋喋不休；不加思考地随口说出
To chatter or babble; to utter rapidly without consideration.
clack
Base
原形
clacks
3rd person
第三人称单数
clacking
-ing
现在分词
clacked
Past
过去式
clacked
Past participle
过去分词
The old wooden floor clacks when you walk on it.
当你走在上面时，旧木地板会噼啪响。
He clacked the two stones together to make a spark.
他噼啪地撞击两块石头以产生火花。
The knitting needles are clacking as she works.
她工作时，编织针正在噼啪作响。
规则动词，过去式和过去分词加-ed。
The old typewriter clacks loudly whenever someone uses it.
每当有人使用这台旧打字机时，它就会发出响亮的噼啪声。
The train wheels were clacking against the tracks as it sped by.
火车飞驰而过时，轮子与轨道碰撞发出噼啪声。
She clacked the knitting needles together impatiently.
她不耐烦地把编织针碰得噼啪响。
不及物用法，主语发出噼啪声。
The wooden floorboards clacked as she walked.
她走路时木地板噼啪作响。
及物用法，使宾语发出噼啪声。
He clacked the billiard balls together.
他把台球撞击得噼啪响。
表示因撞击而发出噼啪声。
The loose shutter clacked against the window frame.
松动的百叶窗咔嗒咔嗒地敲击窗框。
Not this
The door clack loudly.
Use this
The door clacks loudly.
当主语是第三人称单数时，动词需加-s。'clack'的第三人称单数形式是'clacks'。
Not this
Yesterday, the door clack.
Use this
Yesterday, the door clacked.
在一般过去时中，动词需用过去式。'clack'的过去式是'clacked'。
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Dictionary facts from ECDICT, WIKTIONARY.