knock的基本意思是用手、拳等硬物“敲打”,指出声地、连续地猛击。可用作及物动词,可接名词或代词宾语,也可接以形容词充当补足语的复合宾语。

一.knock的基本意思是用手、拳等硬物“敲打”,指出声地、连续地猛击。引申可指发出敲击或爆裂的声响。还可表示“批评”“数落”“非难”。

二.knock可用作及物动词,可接名词或代词宾语,也可接以形容词充当补足语的复合宾语。

三.knock是瞬间动词,如表示重复动作,须用进行体。

四.用作名词

1.爆震声

What's that knock I can hear from the engine?

我听到发动机有爆震声是怎么回事啊?

2.敲；敲打

I heard a knock at the door.

我听到了敲门声。

五.用作动词

1.敲；打；击

Knock that nail in, it's sticking out dangerously.

把那钉子敲进去，它伸出来很危险。

2.批评

Tom's supervisor has kept knocking him 3 days for the failure of financial plan.

由于财务计划失败，汤姆的上司已经数落他三天了。

3.撞

The truck was out of control and knocked a dog to death.

失控的卡车将一只小狗撞死了。

4.（心）怦怦跳

After a long marathon running,my heart is knocking rapidly.

一场长距离马拉松跑下来，我的心脏怦怦直跳。