SAT语法题,以及关于英文句子语法的小疑惑
"In the past, many famous painters meticulously ground their own colors, an attention to detail that is noteworthy." 为什么此处不算断句?是因为在an attention前的which is可以省吗?
还有一个句子到底什么时候算断句（run-on）,要加连词或分号?哪些词是可以连接小句子（如and）,哪些又看上去像但实际不能引出小句?（如however,thereby）假如回答详细我会追加分滴~谢谢了!