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独立主格结构在高中，是学生眼中觉得难掌握使用的一个结构，其实它很简单。
一、独立主格结构的作用
主要用于描绘性文字中，其作用一，相当于一个状语从句，当主句和从句的主语不一致，就可以使用独立主格来表示时间、原因、条件、行为方式等。作用二，相当一个并列句，表示伴随着同时。作用三，相当于一个定语从句，用来修饰名词。
例如：1、The work done(=After the work had been done), we went home.
2、He was lying on the grass, his hands crossed under his head(=and his hands were crossed under his head).
3、The girl with a book in her hand is my sister
二、独立主格结构是怎么构成的呢？
简单句的基本句型，是主谓结构,主系结构和there be 句型。
如果是主谓结构，那就本着动词和前边的逻辑主语的关系来使用非谓语动词，主动doing被动done 动作未发生用to do.
例如：The boy leading the way, we had no trouble finding the strange cave.
My shoes removed，I entered a low-ceilinged room.
Many trees, flowers, and grass to be planted, our newly-built school will look even more beautiful. （花草树木还没有被种植，学校也不是种植的动作主语，用不定式的被动结构to be planted）
The manager looks worried，many things to settle.
（事情还没有处理，而且是由经理本人来处理，用不定式to settle，主动代被动，表示将来的时间）
如果是主系结构,那就把系动词省略,后边会有形容词,副词,名词,介词短语跟着。
例如：An air accident happened to the plane, nobody alive(省去了were )
The lights off, we could not go on with the work.
Two hundred people died in the accident, many of them children.
The boy goes to the classroom, book in hand
如果是there be 句型，那么就把be动词变为being
例如：There being no further business, I declare the meeting closed.
三、注意事项
1、 独立主格的逻辑主语是代词时，不能省略being 。如：Itbeing Sunday, we went to church.因为是星期天，我们去做了礼拜。
2、独立主格的全省略结构
在“名词（或代词）+介词短语”构成的独立主格结构中，省略with,不用物主代词和冠词。如： Miss Smith entered the classroom, （with a ）book in (her) hand.
3、独立主格的with,当独立主格做状语时，时常可以省略，作定语的时候，一般不省略。它的反义词without也可以引出独立主格结构，例如：Without anyone noticing,he slipped through the window.
一、独立主格结构的作用
主要用于描绘性文字中，其作用一，相当于一个状语从句，当主句和从句的主语不一致，就可以使用独立主格来表示时间、原因、条件、行为方式等。作用二，相当一个并列句，表示伴随着同时。作用三，相当于一个定语从句，用来修饰名词。
例如：1、The work done(=After the work had been done), we went home.
2、He was lying on the grass, his hands crossed under his head(=and his hands were crossed under his head).
3、The girl with a book in her hand is my sister
二、独立主格结构是怎么构成的呢？
简单句的基本句型，是主谓结构,主系结构和there be 句型。
如果是主谓结构，那就本着动词和前边的逻辑主语的关系来使用非谓语动词，主动doing被动done 动作未发生用to do.
例如：The boy leading the way, we had no trouble finding the strange cave.
My shoes removed，I entered a low-ceilinged room.
Many trees, flowers, and grass to be planted, our newly-built school will look even more beautiful. （花草树木还没有被种植，学校也不是种植的动作主语，用不定式的被动结构to be planted）
The manager looks worried，many things to settle.
（事情还没有处理，而且是由经理本人来处理，用不定式to settle，主动代被动，表示将来的时间）
如果是主系结构,那就把系动词省略,后边会有形容词,副词,名词,介词短语跟着。
例如：An air accident happened to the plane, nobody alive(省去了were )
The lights off, we could not go on with the work.
Two hundred people died in the accident, many of them children.
The boy goes to the classroom, book in hand
如果是there be 句型，那么就把be动词变为being
例如：There being no further business, I declare the meeting closed.
三、注意事项
1、 独立主格的逻辑主语是代词时，不能省略being 。如：Itbeing Sunday, we went to church.因为是星期天，我们去做了礼拜。
2、独立主格的全省略结构
在“名词（或代词）+介词短语”构成的独立主格结构中，省略with,不用物主代词和冠词。如： Miss Smith entered the classroom, （with a ）book in (her) hand.
3、独立主格的with,当独立主格做状语时，时常可以省略，作定语的时候，一般不省略。它的反义词without也可以引出独立主格结构，例如：Without anyone noticing,he slipped through the window.