【名师点睛】

1.with复合结构的模式是：with+名词/代词（宾语）（作逻辑主语）+形容词/副词/介词短语/名词/v-ing现在分词/过去分词/不定式（作逻辑谓语）。独立主格结构的模式是：主格名词/代词（作逻辑主语）+非谓语动词分句（现在分词、过去分词、不定式）或名词、形容词、副词、介词短语（作逻辑谓语）。

2.With（without）复合结构与独立主格的相互转化

with/without复合结构与独立主格结构在句子中作状语时，一般可相互转换；此外还可以变为状语从句或并列句。

1）作时间状语

With winter coming on, the trees turn yellow and some birds fly south.=  Winter coming on, the trees turn yellow and    some birds fly south.=  When winter comes on, the trees  turn yellow and some birds fly south.

２）作原因状语 

With the key  lost, she could not enter the room. =   The key lost, she could not enter the room. =   As/Because the key had been lost,  she could not enter the room. 另：With us to care for the children you are able to be carefree away from home.=We to care for the children, you are able to be carefree away from home.（注意此处的we 不得改成us，用了us便不是独立主格结构了。）