近期在书上看到一段如下：
“He thought savagely, as he spread manure on the flowerbeds, his back aching,
sweat running down his face. “
想请问版上的先进前辈们，后面所提的 ”his back aching, sweat running down his f
ace. “ 段落中，为何句构是S+Ving呢？文法上不应该S+beV+Ving，也就是写做 ”his b
ack is aching, and sweat is running down his face. “ 这样吗？
感谢各位前辈先进们的耐心与解答！