卉峰呢喃
fall off 不仅仅是自行车，从树上也是，可以理解为从非己身摔下来就用它而且这通常有一个过程，及掉落的过程，可以联想到树叶的飘落fall down 可以理解为直接落地，感觉不到过程fall over确切地说应该是被绊倒，比如被椅子，绳索半道所以说应该用fall off
绝代双椒
从上摔下来 fell off从楼梯上摔下来 fell downstairs从马背上摔下来 kiss the tan从椅子上摔下来 Fell off his chair ; Falling from a Chair ; From his chair fall off从周期上摔下来 fell down from cycle从马背上摔落下来 fall from horse back从飞机上摔下来梅格 meg fell off the jet从自行车上摔下来 fall off my bike ; fall off the bike ; fall from a tree他从自行车上摔下来 His falling from a bicycle ; fall off from his bicycle
