一个名词(或其它形式)对另一个名词或代词进行解释或补充说明，这个名词(或其它形式)就是同位语。同位语与被它限定的词，常常紧挨在一起。今天我们就来讲解一下GMAT语法知识点同位语内容解析。
位置：紧邻左右。
形式：
非从句形式：(1)Mr. Smith, our new teacher, is very kind to us.Mr. Smith是主语our new teacher的同位语，指同一人。(2)We Chinese people are brave and hard-working.Chinese people是we的同位语。
从句形式：同位从句一般跟在某些名词如answer(答案)，hope(希望)，fact(事实)，belief (信仰)，news(消息)，idea(主意;观念)，promise(承诺)，information(信息)，conclusion(结论)，order(命令)， suggestion(建议)，problem(问题)，thought (想法)等后面。
(1)The fact (that he had not said anything), surprised everybody.在本句中，括号部分是同位语从句，其先行词是名词fact。
(2)She told us her hope( that she would become a pianist).在本句中，括号部分是同位语从句，其先行词是名词hope。
例1：
The investigations of many psychologists and anthropologists support the generalization of there being little that is a significant difference in the underlying mental processes manifested by people from different cultures.
(A) of there being little that is a significant difference
(B) of there being little that is significantly different
(C) of little that is significantly different
(D) that there is little that is significantly different
(E) that there is little of significant differences
解析:
(A) of there being代替that同位语从句表达复杂,笨拙并且不符合习惯.
(B) 错误同A选项
(C) 错误同A选项
(D) 正确, 用that同位语从句清楚地解释了generalization的内容
(E) significant differences在这里可以理解为有重要意义的区别,也可以理解为重要的区别,因此不如significantly表达意思清楚
例2：
In laboratory rats, a low dose of aspirin usually suffices to block production of thromboxane,which is a substance that promotes blood clotting, but not seriously interfering with the production of prostacyclin, which prevents clotting.
(A) which is a substance that promotes blood clotting, but not seriously interfering
(B) a substance that promotes blood clotting, but not seriously interfering
(C) a substance that promotes blood clotting, but does not seriously interfere
(D) which is a substance to promote blood clotting, but does not seriously interfere
(E) which is a substance that promotes blood clotting, but not a serious interference
解析：
(A) promotes…, but not…interfering…结构不平行
(B) 错误同A选项;
(C) 正确, a substance that…独立主格结构作为thromboxane的同位语对thromboxane进行解释说明; but does跳过同位语和suffices并列共同作为a low dose of aspirin的谓语动词
(D) but does…更像是跟is a substance…并列,从而作为了thromboxane的谓语动词,改变了原句的意思
(E) but not a serious语法上只能跟is a substance并列(因为前面有which is a substance that…所以but not a serious…可以视为but is not a serious…的省略结构,但是却不能做为…usually suffices的省略结构),共同修饰thromboxane,改变了原句的意思。
注意：
GMAT一个常见的错误就是把一个完整的概念用一个名词来代替,造成对概念的解释不完整或引起结构的复杂. 这种错误常出现在宾语从句和that引导的同位语从句中:
that引导同位语:
Scientists find a result that rats will demonstrate some interesting behaviors.用名词来代替会变成:
Scientist find a result of rats that will demonstrate some interesting behaviors. (解释不完全)或Scientist find a result of rats as demonstrating some interesting behaviors.(结构笨拙,复杂)
宾语从句:
…revealed that creatures of the seabed were suffering because food supplies were dwindling…
用名词来代替:
…revealed creatures of the seabed that…(解释不完全)
…revealed creatures of the seabed’s suffering…(结构笨拙,复杂)
解决这两种问题的方法就是用 that 从句引导句子,简化结构,并能够进行完整的解释。
》》点击了解GMAT语法定语、状语、同位语和独立主格解析
以上就是GMAT语法知识点同位语内容解析的内容的介绍，GMAT语法考试有其自身的鲜明特点，考生在备考时要以GMAT语法规则为导向，熟练运用GMAT语法解题技巧，这样才能轻松拿下GMAT语法。更多关于GMAT备考的资讯小编会持续为大家送上，祝大家早日梦圆名校。
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