新概念英语小疑问it's running across the grass.running是跑的意思across是横穿,

新概念英语小疑问it's running across the grass.running是跑的意思across是横穿, The dog's running across the grass.It's running after a cat. she is running across the grass.句子成分 The dog's running across the grass.狗在草地上跑,为什么要加across?3Q running running running running running running running 的意思是 i see a dog running across the field.中请问running是动名词还是现在分词? I saw a cat running across the road.后面的across the road是什么成分? 英语句子成份的问题It's running after a cat.It是主语,running after是谓语,a c a car is running across street quickly 翻译成,一辆小汽车飞快地横穿大街 quic 英语翻译它正在公园的草地上追一只猫：It's running after a cat on the grass of t The dog is the garden ,too.It is running aeross the grass的中文 across species的意思及造句是?