across the yard from them是一个介词短语,可以翻译成“从他们那儿穿过院子”.例如：
I live in an apartment across the street from here.
across the street from here在这里是做定语的,修饰前面的apartment表示从这里穿过大街的一所公寓.
across from有时也可译成“在...的对面”,例如：
The post office is just across from the club .
邮局就在那俱乐部对面.