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across,through,over的区别张春红肥城龙山中学微课制作across,through,over这三个介词都可以表示“穿过”之意，但含义并不相同。1.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，即“横穿、横过”。从房间、原野、海洋等“平面延伸”的一端横越到另一端时也常用across.Peoplearewalkingacrossthestreet.Ittookthemsixweekstowalkacrossthedesert.acrossacrossThebirdswamacrosstheriver.across2.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。Asmalltrainwentthroughthetunnel.throughTheriverflowsthecityfromthewesttotheeast.Thesunshinegoesintothestudythewindow.throughthroughTheyaredrivingtheforest.throughover既可用作介词又可用作副词，意为“越过、翻越过去”。Thelittlerabbitjumpedoverthehurdles.overTheywillfindmanyflowersaftertheyclimbthehill.ThebridgetheHaiRiverlookswonderful.overover