为什么是 walk over the mountain

为什么是 walk over the mountain 为什么是class is over 不是the class is over walk across the bridge还是walk over the bridge?walk across the bridge正确还是walk over the bridge正确? walk sb.over to the hospital是什么意思? 什么是Over-The-Counter? 为什么是the boys is playing football over there? fly over the river ,fly across the river ,walk over the bridge ,walk across the bridge有什么区别 take a walk ____ the quiet park on Center Avenue 为什么是through而不是from walk through the Sixth Avenue不是要用across吗,为什么是through 为什么是in the past three years而不是over the past three years The meeting over,the students were dismissed.meet本身就是名词为什么是动名词形式呢? They are walk over the bridge.I'm going watering the flower.Are there some books on the shelf?They are walk over the bridge.I'm going watering the flower.Are there some books on the shelf?Is that a bottle of milk on me?What are you going to do for th 请问walk over walk all over school is ___（结束 ）at about 5：00p.m.为什么是填over? I'm too tired.Ican't walk any f---.let's have a rest now.The l--- they are talking with over there is my new English teacher 请详细叙述through和across的差别；并解释为什么是walk across the bridge而不是through；另外walk（）the tunnel? 用walk across the bridge还是walk over the bridge?we walked ( ) the bridge and soon came to a hut