高三英语语法和惯用法：什么叫分词的独立主格结构

　　在通常情况下，分词作状语时它的逻辑主语应与句子主语一致，若不一致，则应改用其他句型，如：

　　误：Crossing the road, a car knocked him down.

　　正：Crossing the road, he was knocked down by a car. 过马路时他被车撞倒了。

　　正：When he was crossing the road, a car knocked him down. 他过马路时车子把他撞倒了。

　　解决状语分词的逻辑主语与句子主语不一致的问题，也可在分词前加一个名词或代词，使之成为分词的逻辑主语。由于加在分词前的名词或代词要用主格形式，故称分词的独立主格结构。如：

　　The job finished, we went home. 工作结束后我们就回家了。

　　The weather being fine, we went swimming. 天气很好，我们就去游泳了。

　　He being absent, nothing couldnt be done. 由于他缺席，什么事也干不成。

　　以上各句的the job, the weather, he 等不能省略。