Iheardthataboythemountain.我听说一个男孩从山上摔下去了.该怎么填?这道题我填的是felloff,可答案是felldown,为什么?不需要详细说明felloff和felldown的区别,我只不过是想问,falloff不是

Question

I heard that a boy ____ ____ the mountain.我听说一个男孩从山上摔下去了.该怎么填?
这道题我填的是fell off,可答案是fell down,为什么?
不需要详细说明fell off 和fell down的区别,我只不过是想问,fall off不是从xx跌落,为什么答案不是它的?
么么哒~n(*≧▽≦*)n

Answer 1

I heard that a boy ____ ____ the mountain.我听说一个男孩从山上摔下去了.该怎么填?
I heard that a boy had fallen down the mountain
fall off sth=fall down from sth
fall down +名词=从高处向低处掉/滑落下来