be on one's knee（跪着）造句加中文

be on one's knee（跪着）造句加中文 为什么"跪着"是on one's knee而不是with one's knee? get down on one`s knee=kneel down吗? be well on one`s way to 造句 get down on one's knee可以解释为求婚么? on one's right 造句 with one's knee啥意思? be on one's foot knee on be absorbed in 后可以加doing sth.还有focus one's attention on ,on后 fix one's eyes on(注视）造句 请用ON ONE'S BIKE造句 PS：请问BE ILL中的BE是BE动词吗?