作业帮knock on与knock at的区别
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knock on与knock at的区别
knock on与knock at的区别
knock on与knock at的区别
knock on 撞击撞出；
knock at 敲（门、窗等）
Who is that knocking at my door?
谁在敲我的门?
Knock on: 敲（门、窗等）
例句与用法:
1. He accidentally knocked on (the pass from Jones).
他非故意犯规, 用手向前击了（从琼斯传来的）球.
2. Jim sat up when he heard the knock on his bedroom door.
吉姆听到敲寝室门的声音时便...
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Knock on: 敲（门、窗等）
例句与用法:
1. He accidentally knocked on (the pass from Jones).
他非故意犯规, 用手向前击了（从琼斯传来的）球.
2. Jim sat up when he heard the knock on his bedroom door.
吉姆听到敲寝室门的声音时便坐了起来。
3. Please do not enter before knocking on the door.
进来前请先敲门。
Knock at: vt. 敲
例句与用法:
1. There was a furious knock at the door.
有人在猛烈地敲门。
2. Did I hear a knock at the door?
是有人敲门吗?
3. Did you hear the knocks at the door?
你听到敲门声了吗？
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knock on 主要强调on后面的介质，侧重讲声音的来源；而knock at主要强调at后面的位置，侧重讲声音的地点。
以“敲门”这个短语为例，knock on the door表明“有敲门声”；而knock at the door则表明“（有人）在门口敲门”。