为什么"跪着"是on one's knee而不是with one's knee?

为什么"跪着"是on one's knee而不是with one's knee? be on one's knee（跪着）造句加中文 with one's knee啥意思? get down on one`s knee=kneel down吗? get down on one's knee可以解释为求婚么? 〔She got right down on one knee and propose. knee on father's likes little to on her sit Jane knee I cut my knee.It hurts.hurt为什么加s one on one's 为什么pull one's leg是开玩笑,而不是拖后腿? with one's hands on one's stomach 的意思