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Floral Posted 22 years ago
Grammar

"on" or "at"

"knock on the window" and "knock at the window",

which one is the best choice?
  

Top answer

I prefer the second

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2 Answers
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The choice of the most appropriate preposition depends, often, on the context:

1. He knocked on the window. [the meaning in obvious: the window is where he knocked]

2. He knocked at the window. [there is a slight connotation that he knocked at the window instead of a more obvious place, like the door]