across是介词;cross是动词。 They live across the Central Plaza.他们住在中央广场的对面。 They have crossed over to Japan. 他们已东渡去日本了。 cross除作动词外,亦可作名词。作名词时,有较强的构词能力,例如crossroad是“交叉路”或“横马路”,而crossroads却是“十字路”或“十字路口”,它的前面可以用a,但-s不能丢掉。如: The accident took place at a crossroads.车祸发生在十字路口。 They drive across the plain by way of a crossroad leading to the highway. 他们沿着一条通往公路的交叉路驾车横过平原。 crossing是“渡口”、“横道线”或“(铁路与公路的)交叉点”。如: All cars should stop at the zebra crossing.所有车辆都要在斑马线前停下。 A bus ran into a train at the level/grade crossing.一辆公共汽车在平交点与火车相撞。
through则是用在三维空间的动作。如: I pushed through the crowds to the entrance |