fall和fall down有什么区别?为什么有的时候说water fall from the clouds有时却说it fall down from the clouds?

fall off和fall down 有什么区别 请问 fall down fall off fall away有什么区别? fall down into,fall down,fall down onto,fall into有什么区别 fall down /drop down有什么区别? fall over 和fall有什么区别 fall和fall down有什么区别?为什么有的时候说water fall from the clouds有时却说it fall down from the clouds? fall down和fall off的区别 fall down和fall of和fall from的区别 A.fall over B.fall off C.fall down这三个词什么意思和区别 请问：fall down,fall over,fall off有和区别?主要讲讲搭配！ fall down,fall over,fall off有和区别?谢谢! 主要讲讲搭配! fall off,fall down,fall from的用法和区别.最好有例子. fall off 、fall down、 fall over区别 fall off fall over fall behind fall down 区别的 fall down. fall through. fall over. fall on 区别 fall down和fall into 的区别是什么 fall off 与fall down有何区别? 英语fall down,over ,off有什么区别?