knock over和knock down的分别?

问题描述:

knock over和knock down的分别?
A car knock the boy over!可以说成是A car knock over the boy!knock over和knock down可以互相替换来用吗?

knock over 碰翻; 打倒Coming too fast down the road,I knocked over a child on a bicycle.由于车开得太快,我把一个骑自行车的小孩撞倒了.使吃惊The unexpected news fairly knocked me over.那意外的消息着实使我...