小伙伴们有没有被SAT语法中的同位结构难住呢?不要担心，今天为大家介绍的就是SAT语法考点之同位结构的攻克方法。
同位结构:
同位结构是句子中指代同一事物的两个名词或词组构成同位关系，简单的说就是一个较长的名词或是词组对一个相邻的名词进行进一步的解释说明。同位结构一般要求一前一后，位置相邻，
例：Mary, a pretty girl, is popular among the boys.
子这个句子中，a pretty girl 为名词性结构，对名词Mary进行补充说明。
使用同位结构，可以简化句子，是句子更加清晰。
例：his only interest in lift is reading novels and it brought him much enjoyment。
使用同位结构，可以简化为：
His only interest in life, reading novels, has brought him much enjoyment.
例题1: While visiting our cousins in the Spanish city of Granada, the palace and fortress called the Alhambra was see, with its splendid courts, fountains, and gardens.
(A) the palace and fortress called the Alhambra was see, with its
(B) the palace and fortress called the Alhambra was what we saw; it has
(C) we saw the Alhambra, a palace and fortress; its having
(D) we saw the Alhambra, a palace and fortress with
(E) seeing the Alhambra, a palace and fortress with
答案：D
分析：主句中的逻辑主语要和visiting保持主谓逻辑一致，因此将答案定位在C,D选项中，D选项中的with表示”带有”的意思。C选项中的having不能充当谓语动词，所以是错误的。
例题2: by the end of 1945, Alice, thirty years old but already an expert in the field of family dynamics, had begun writing her memoirs.
(A) an expert in the field of family dynamics, had begun writing
(B) being an expert in the field of family dynamics, she began writing
(C) as an expert in the field of family dynamics, began to write
(D) because she was an expert in the field of family dynamics she had begun to write
(E) she was an expert in the field of family dynamics, began writing
答案：A
分析：这个句子中，主语是Alice，thirty years old but already an expert in the field of family dynamics是同位语，所以had begun writing充当谓语是正确的。
在SAT考试中，涉及的同位语结构一般是比较复杂的
例：Ancient Chinese people believed that rice has therapeutic function, a belief that has been dominant in Chinese culture.
这个句子可以看作是一种特殊同位结构的运用。在一个完整句子的后面，往往用一个抽象名词来概括逗号前句子的内容，然后再用一个分句或抽象名词进行进一步修饰说明。这样，这个抽象名词和前面的这个句子(有时候是句子的某一个重要成分)构成了一种同位关系。
例：I failed my exam and lost my girlfriend, a situation that in had never encountered before.
例题1:
The information age has ushered children into a global society, this situation causing educators to lament a lack of texts that explain the diversity of cultures.
(A) this situation causing educators to lament
(B) which is the cause of educators lamenting
(C) this causing educators to lament
(D) a situation causing educators to lament
(E) and with it educators’ lament at
答案：D
分析：D选项中的a situation和前面的The information age has ushered children into a global society构成了一种同位关系，situation进一步解释说明前面的内容。
在特殊的同位结构中，有时不是选择一个抽象名词(如上述句子中的a belief, a situation),对前面的内容进行总结，而是对前面句子中的某个名词进行简单重复，这种重复可以看作是一种修辞手段，有强调的效果。
在普通文法和SAT文法中都是可以接受的
例： We are living in a most dangerous age, an age marked by biological warfare and atomic bombs.
上句中，对age进行重复是一种修辞手段，是用an age后的分词结构来对a dangerous age进行进一步修饰，以达到生动的效果。
例题：After napoleon’s defeat in 1815, the congress of Vienna guaranteed Switzerland’s neutrality. Since then, the neutrality has never been broken.
(A) neutrality. Since then, the neutrality has never been broken.
(B) neutrality, since then, the neutrality has never been broken.
(C) neutrality which has never been broken
(D) neutrality, having never been broken
(E) neutrality, a neutrality that has never been broken
答案：E
分析：a neutrality是对前面neutrality的重复修饰。
以上就是小编为大家整理汇总的SAT语法中的同位结构内容，希望对大家的SAT备考有帮助。
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