fall down強調的是“滑倒、倒下”,後接賓語時應加上介詞from.
The boy hit the tree to hard that he fell down.
男孩重重地撞在樹上,結果自己倒下了.
If people run across the road,they may fall down.
如果人們跑過馬路的話,他們可能會摔倒.
fall off強調的是“跌落、從……掉下來”,後直接接賓語.
The girl is falling off the bike. （= The girl is falling down from the
bike.）
女孩正從腳踏車上摔下來.
They spread a big net in case Tom should fall off the tree and get hurt.
他們張開一張大網以防湯姆從樹上掉下來受傷.
fall down強調的是“滑倒、倒下”,後接賓語時應加上介詞from.
The boy hit the tree to hard that he fell down.
男孩重重地撞在樹上,結果自己倒下了.
If people run across the road,they may fall down.
如果人們跑過馬路的話,他們可能會摔倒.
fall off強調的是“跌落、從……掉下來”,後直接接賓語.
The girl is falling off the bike. （= The girl is falling down from the
bike.）
女孩正從腳踏車上摔下來.
They spread a big net in case Tom should fall off the tree and get hurt.
他們張開一張大網以防湯姆從樹上掉下來受傷.