1. She heard three loud knocks on the door.
她听到门外传来三声响亮的敲门声。

2. He always knocks before entering a room.
他总是在进入房间之前敲门。

3. The heavy rain knocks against the window panes.
大雨猛烈地打在窗户玻璃上。

4. She knocks on the table to get everyone's attention.
她敲击桌子吸引大家的注意。

5. The noise from the construction site knocks me out of my concentration.
建筑工地的噪音让我无法集中注意力。

6. He knocks back a shot of whiskey before heading out.
他在出门前灌下一口威士忌。