顺便问下knock off和knock over 在撞到的意思上如何区分使用

Question

顺便问下knock off和knock over 在撞到的意思上如何区分使用
 

Answer 1

ask for 是固定搭配 有请求、要求的意思,这里是指“要钱”
当knock off和knock over同时在表示“撞倒”意思的时候,knock over一般就是指撞倒（+ed被动）,比如说A boy was knocked over by a passing car but was fortunately unhurt.而knock off则指从某个地方（被）撞倒,如A boy was knocked off his bike by a passing car but was fortunately unhurt.knock off:
knock off 更强调从原有的位置消失；而knock over 更强调姿态上的歪斜