|
发表于 2012-5-22 12:00:25
|
显示全部楼层
knock verb, noun verb
AT DOOR / WINDOW
1[v] knock (at / on sth) to hit a door, etc. firmly in order to attract attention
SYN rap:
He knocked three times and waited. Ç Somebody was knocking on the window.HIT2knock (sth) (against / on sth) to hit sth, often by accident, with a short, hard blow:
由上可见,基本是通用的。at用的比较多。on更多的用于British English.
我认为如果一个常用at的人,用on,表示他很强调需要敲门。
供参考。
|
|