巧妙剖析 fall
词组
高中英语 梁颖
fall down ? fall off ? fall over ?
fall down，不强调落物
fall off ， 强调落物
fall over，1.意外摔倒
fall over，2.向前绊倒
fall down vs fall off
fall down from the stairs
fall off the stairs
for example ：
Autumn comes and leaves are falling off the trees. 秋天到了，落叶纷纷。
The boy hit the tree to hard that he fell down. 男孩重重地撞在树上，结果自己倒下了。
  The girl is falling off the bike.   = The girl is falling down from the bike.