they are walking over the bridge为什么不是across the bridge?

问题描述:

they are walking over the bridge为什么不是across the bridge?

虽然walk over 和across都有走过的意思,但是across是横过,比如横过马路,并且across不是动词,也不能直接这么用,要么是cross the road,或者是go across the road.