①through穿过（through是介词，意思是从立体空间穿过，与in有关）:
through the forest穿过森林／through the jungle穿过热带丛林／through the clouds穿过云层／through the tunnel 穿过隧道
He drove through the tunnel.他开车经过了隧道。
They walked through the forest.我们徒步穿过了森林。
②across穿过（across 是介词，意思是从平面上穿过，与on有关）:
across the street穿过大街／across the road穿过马路
He ran across the street.他跑过了大街。
③cross穿过（cross是动词，cross=go across）
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