【fell】fell短语的区别与解释fell down ,fell to,fell off,fell over

【答案】 这看四个介词的区别 down向下 to 从.到
　　off离开.over到处 所以
　　1.fell down 倒下跌倒
　　She fell down and grazed her knee.
　　她摔倒在地,碰破了膝盖.
　　2.fell to倒向.落到.
　　The branch broke and fell to the ground.
　　树枝断了,落在地上.
　　The thermometer fell to zero lastnight.
　　昨夜温度计显示气温下降到零度.
　　除了上面的它还可以表示 开始,开始吃.
　　Sat down for lunch and fell to.
　　坐下来开始狼吞虎咽地吃午饭
　　She fell to brooding about what had happened to her.
　　她开始沉思默想自己的遭遇.
　　3.fell off,落下(衰减,下降)
　　To my great amusement his false beard fell off.
　　使我感到极其好笑的是他的假胡子掉下来了.
　　I need a new bicycle lamp my old one fell off and broke.
　　我需要一个新的自行车车灯--旧的摔破了.
　　4.fell over 翻倒
　　1.Her hair fell over her shoulders in a mass of curls.
　　她的鬈发披在肩上.
　　2.He fell over on the ice.
　　他摔倒在冰上.
　　3.She fell over and broke her leg.
　　她跌倒后摔折了腿.