新概念第二册最后一句的句子结构是怎样的?

for it looked on sympathetically until the drunk was out of way before once more turning its attention to the matador
因为它一直同情地看着醉汉,直到他的背影消逝,才重新将注意力转向斗牛士.
before once more turning its attention to the matador是介词短语作时间状语修饰was out of way
其中turning its attention to the matador是动名词短语作介词宾语,once more是动名词的状语
介词短语的意思是 在再次将注意力转向斗牛士之前