请问：fall down,fall over,fall off有和区别?

fall down,fall off和fall over都表示“摔倒、跌倒”的意思,但它们各自的含义不同.fall over强调的是“向前摔倒、跌倒”.She fell over and broke her leg.她跌倒并把腿摔断了.There is too much snow on the ground...