fall off 与fall down的区别?它们怎么用?

请问fall off,fall to与fall down的区别 fall off fall over fall behind fall down 区别的 fall off 与fall down的区别?它们怎么用? fall off 与 fall down 区别 fall off fall from fall down fall fall off fall from fall down fall fall down和fall off的区别 fall off与fall down与fall into区别 fall off 、fall down、 fall over区别 fall off 与fall down有何区别? fall down fall off all over fall on falling 这几个词的区别.题目再清楚些fall down fall off fall over fall on falling fall off同义词Fall down 和fall off的意思相同吗？ 关于fall down/off 和cut down/off的用法 英语fall off = fall down from fall down fall off fall into 的区别 别抄前面的 fall off,fall down,fall from的用法和区别.最好有例子. fall down 和fall off以及 fall from的区别是什么 fall over fall off fall down 请求翻译