Question

fall down和fall off的区别

Answer 1

fall down强调的是“滑倒、倒下”,后接宾语时应加上介词from.
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.
If people run across the road,they may fall down.
如果人们跑过马路的话,他们可能会摔倒.

fall off强调的是“跌落、从……掉下来”,后直接接宾语.
The girl is falling off the bike. （= The girl is falling down from the
bike.）
女孩正从自行车上摔下来.
They spread a big net in case Tom should fall off the tree and get hurt.
他们张开一张大网以防汤姆从树上掉下来受伤.

Answer 2

fall down 跌倒；失败；倒塌， 主要表示具体
fall off 减少；跌落；下降；离开；衰退，倾向于表示抽象