This flowerpot is broken.Who knocked it ___?

Question

根据上下文填上正确的介词或副词。
答案是over。那么off也可以吗？

Answer 1

只能用over, 不能用off。因为是knock sth. over 把...撞翻，而knock sth. off sp. 其意思是把什么东西从某处撞落下来，后面还要再接个地点作宾语才行。即over在此处 是副词，off 是介词。
eg: I knocked the vase off(=down from) the table and it was broken.

Answer 2

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本回答被提问者采纳

Answer 3

两个都有撞倒的意思。
但knock it over的意思多为不是故意的。
而knock it off得意思多为是故意的。
问的时候当然不能问针对性比较强的knock it off,问knock it over比较中庸。

Answer 4

off表示弄倒，击倒，碰倒。