get knock down是什么意思？

应该是 get knocked down 吧？

get + 动词的过去分词 表被动语态

knock down 是一个词组，意思是：击倒,撞倒,(投篮)命中

get knocked down 意思是：被击倒、被撞倒
例如：I get knocked down, but I get up again.

其它的例如：

1.窗户被弄坏
—How did the window get broken ?
—No one knows.

2.人被枪击
The police say the man was shot when they found him, but they don’t know when he got shot.

knock down是动词：击倒，拆卸，拍卖出，前面好像不能加动词。
抱歉帮不到你了

击倒，拆卸