两个不同的独立主格结构分别修饰/ 伴随各自的句子：1 She thanked him and hung up the phone ,her tears now flowing hard.（独立主格结构在后面）2 Her fingers shaking as she slowly reached to get the card.（...as怎么回错呢，请您再仔细讲讲，我不明白。你好。AS是连接词，所以它的前后都必须是句子：as Tom was ill,I did the work for him.这句子是对的。如果改写成独立主格结构，就必须是：Tom being ill,I did the work for him.看见了吗，这句里面的AS不见了，WAS变成了being.这就是所谓的独立主格结构。反复阅读，你就能看懂。