knock

敲；打；敲击英释中释vto hit a door or window with your closed hand to attract the attention of the people inside

敲；敲打；爆震声英释中释nthe sound of something hard hitting a hard surface

1 knock on,撞击撞出；敲击（门、窗）

2 knock at,敲（门、窗等）

3 knock off,击倒；停工；中断

4 knock down,击倒；拆卸

5 knock at the door,敲门；把……撞倒；撞墙

6 knock out,敲空；击倒；打破；使筋疲力竭

7 knock it off,停止做；住口，别再讲下去了

8 knock on the door,敲门

9 knock over,打翻；撞倒

10 knock in,（把钉子）钉入

11 knock on wood,敲木头，企求好运；吉人天相

12 knock up,敲门唤醒；[英口]筋疲力尽；往上敲

13 knock back,（摇把）反击，（活塞）逆行，（曲轴）反转；反座；回击，击退；使...大吃一惊

14 knock against,撞击，与…冲突；偶然遇见

15 knock sensor,爆振传感器；进气流量传感器

16 knock into,撞上；与…相撞

17 knock off work,敲落工作；歇工

1 I knocked and knocked but nobody answered..我把门敲了又敲，但无人回应。