近期在書上看到一段如下：
“He thought savagely, as he spread manure on the flowerbeds, his back aching,
sweat running down his face. “
想請問版上的先進前輩們，後面所提的 ”his back aching, sweat running down his f
ace. “ 段落中，為何句構是S+Ving呢？文法上不應該S+beV+Ving，也就是寫做 ”his b
ack is aching, and sweat is running down his face. “ 這樣嗎？
感謝各位前輩先進們的耐心與解答！