应该是 get knocked down 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.