this flowerpot is broken .who knocked it___ knock over knock off 有什么区别 ,

区别
knock over 打翻；撞倒
cause to overturn from an upright or normal position
it is the same meaning like these phrases,for example, run down, smash down
Did you knock over a parking meter?
你是撞倒了一个停车收费表吗？
knock down
击倒；拆卸
n.
a blow that knocks the opponent off his feet
v.
1. cause to come or go down
2. knock down {with force}
adj. strong enough to knock down or overwhelm
it is the same meaning like these phrases,for example,bowl over, lay low
so the key to the answer is "knock over"

knock over 撞翻；打翻 这是答案
knock off 击倒；撞倒
很高兴为你解答！
老师祝你学习进步！
望采纳，多谢你的问题！^_^

over吧,打翻
knock off off是介词,要加宾语 = knock down from
比如I knocked the bottle off the table.