请问across,through,over有何区别?

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请问across,through,over有何区别?
请问across,through,over有何区别?

请问across,through,over有何区别?
这三个介词都可以表示“穿过”之意,但含义并不相同.across.across的含义与on有关,暗示“穿过”的动作是在物体的表面上进行,意在表示从某个平面的一边移到另一边.要与表面接触.
There used to be no bridge over the river.People had to swim across it.过去河上没有桥,人们只得游过河去.Let's go there and help the old man across the street.咱们过去帮助那位老人过大街吧.We often walk across the playground.我们常常横穿操场而过.It took him six weeks to walk across the desert.他行走了六个星期才穿过了沙漠.through的形象描述2.through的含义与in有关,暗示从某一物体的内部“穿过”,即动作是在物体的三维空间进行的,四面八方都有东西.表示“穿过”树林、洞、门、窗、房间等时,均可用through.
Go through the back door,and you'll find a garden.穿过后门,你就会看到一个花园.over的形象描述3.over既可用作介词又可用作副词,意为“越过、翻越过去”.
After they climbed over the hill ,they found many flowers in the fields.在他们越过那座山之后,他们发现原野上盛开了很多鲜花.Jack told me that he could jump over the desk.他告诉我他能够从桌子的一方跳过来.也可以是从物体表面上方经过,但不与物体接触.The bird flew over the river.鸟飞过河流.

across 从物体表面穿过eg. walk across the road \4\3through 从物体内部传过eg. go through the tunnel \4\3over 在物体的正上方eg. There is a light over your head.]

有一个立方体,贴着面通过时用across,从立方体中横穿用through,不挨着立方体而从上方越过用over]