knock at和knock on的区别

knock at和knock on有什么区别

一、含义不同

1、Knock on

释义：敲击，结束。

例句：Please do not enter before knocking on the door.

进来前请先敲门。

2、Knock on

释义：敲，撞

例句：Did you hear the knocks at the door?

你听到敲门声了吗?

二、用法不同

1、Knock on

用法：后面可以跟其他物品。

2、knock at

用法：只用于表示敲门。

三、knock at本身就是个固定的词组形式,在表示为敲门或者其它都可以用。

而knockon并不是词组形式,on只是修饰后面跟的名词的介词罢了。

knock at和knock on的例句

knock at例句：

1、Late that evening, there was a knock at the door.

那天深夜，有人敲过门。

2、Knock at my window at eight o'clock and I'll be ready

8点钟敲我的窗，我会准备好的。

3、I was wakened by a knock at the door.

敲门声把我吵醒了。

knock on例句：

1、He got a nasty knock on the head.

他头部遭到重重一击。

2、He went up the garden path to knock on the door.

他穿过花园小径去敲门。

3、While he was half asleep, he seemed to hear a knock on the door.

矇胧中他仿佛听到有人敲门。