1. 跌落：fell into the habit of 养成 | fell off 跌落 | fell on 落到

2. 落下,衰退,下降：赏识,鉴赏,感激-appreciation | 落下,衰退,下降-fell off | 粗略地,粗糙地,粗暴地-roughly

3. 从. . . 上摔下来：self do ,self have 自作自受 | fell off...从. . . 上摔下来 | semester 学期