fall down，fall off和fall over都表示「摔倒、跌倒」的意思，但它們各自的含義不同。
fall over強調的是「向前摔倒、跌倒、落在...之上、 臉朝下跌倒 」
。
She fell over and broke her leg. 她跌倒並把腿摔斷了。
There is too much snow on the ground. If you ride much too fast，you will fall over.
地上的雪太多，如果你騎得太快的話，你會摔跤的。
fall down強調的是「倒塌、掉下、倒下」，不強調落物的來處，後接受詞時應加上介詞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。
A stone fell down in the earthquake.
一塊石頭落了下來，砸中了他。
The old house fell down in the earthquake.
老房子在地震中倒塌了。
fall off強調的是「跌落、從……掉下來」，後直接接受詞。
The girl is falling off the bike. (= The girl is falling down from the bike.)
女孩正從自行車上摔下來。
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。
I saw him fall off his horse.
我看到他從馬上掉了下來。
Flowers fell off to the ground.
花兒凋謝了，落到了地上。
Autumn comes and leaves are falling off the trees.
秋天到了，落葉紛紛。
自我測試
請將下列句子譯成英語。
1. 那書從桌上掉落在地板上。
2. 他掉進水裡了。
3. 這個籃子裡裝滿了雞蛋，不要把它打翻了。
4. 小孩兒學步時常會跌跤。
答 案：
1. The book fell down from the table to the floor. （The book fell off the table to the floor.）
2. He fell over into the water.
3. This basket is full of eggs. Don't let it fall down.
4. Babies often fall down when they are learning to walk.