我的答案是:1.across是介词,表示穿过,横穿的意思。经常放在动词后使用。例如:Walk across the street,and you will find the park.2 .cross是动词,横穿,穿过,相当于动词+across.例如:Cross the road,the park is on your left. 3.across from是介词短语,表示在对过,对面。例如:The park is across from my house.
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