独立主格结构和伴随状语的区别

二者是一致的，只不过独立主格不仅仅表示伴随，还可以表示其他，比如原因等。

He was lying on the grass，his hands crossed under his head. (=and his hands were crossed under his head). 他躺在草地上，将两手交叉枕在脑后。