cross,across,through,over的用法区别主要是：across,cross是横过的意思,across是介词,通常在用go,run,swim.等搭配；cross是动词,通常可以直接放在句子中；through是穿过,跟across一样介词,通常在用go,run,swim.等搭配；through与cross的不同在于：through是从中通过across是从事物表面穿过；over 是越过,在…上方。例如：
①I went across the road = I cross the road.
我横过马路(经
斑马线)。
②The river runs through our city.
这条河流经我们市。
③He passed through the hall.
他穿过大厅。
④I swam across the Changjiang River 20 years ago.
20年前我横渡了长江。
⑤Look left and right before you go across the street.
过马路时要左右看。
⑥She put a blanket over the sleeping child.
她给熟睡的孩子盖上毯子。
⑦She climbed over the wall.
她翻过墙去。
⑧a bridge over the river
横跨河面的桥。
⑨They held a large umbrella over her.
他们给她撑起一把大伞.。