GMAT语法的一大考点就是平行结构，所以想要语法得到高分，平行结构必须要弄清楚。平行结构也是GMAT语法的专属考点，本文就给大家带来GMAT语法平行并列真题解析，希望对大家有帮助。由于篇幅较多，我们分开几部分给大家讲解。接着讲解第二部分。
例3：
Sunspots, vortices of gas associated with strong electromagnetic activity, are visible as dark spots on the surface of the Sun but have never been sighted on the Sun's poles or equator.
A are visible as dark spots on the surface of the Sun but have never been sighted on
B are visible as dark spots that never have been sighted on the surface of the Sun
C appear on the surface of the Sun as dark spots although never sighted at
D appear as dark spots on the surface of the Sun, although never having been sighted at
E appear as dark spots on the Sun's surface, which have never been sighted on
分析： Sunspots, 是句子主语，vortices of gas associated with strong electromagnetic activity前后都是逗号，我们把它连带前后的逗号都当做插入语，vortices of gas是一个名词1+of+名词2的结构，associated with strong electromagnetic activity是动词的ed分词形式，做的是就近名词gas的定语，are visible是谓语，as dark spots 介词短语，on the surface of the Sun but have never been 这句话中出现了并列连接词but,but之后仅仅跟着谓语动词have never been，那么这里的but是不是并列的就是谓语呢?我们看一下五个选项。A选项就是 are visible but have never been的一个并列，B选项是are visible…… that never have been是that引导的一个定语从句，改变了句子意思，C，D和E都出现了 appear，关于 appear的使用，我们这里介绍下， appear可以有 appear to do, appear to be, appear that,还有it appear that，但是从来没有appear as 或者appear on的这种表达，所以C，D和E都排除。再者B选项改变了句子意思，that never have been 变成了修饰dark spots ，其实是想修饰Sunspots, 所以正确答案应该是A选项。
正确句子
Sunspots, vortices of gas associated with strong electromagnetic activity, are visible as dark spots on the surface of the Sun but have never been sighted on the Sun's poles or equator.
验证：
Sunspots, 是句子主语。vortices of gas associated with strong electromagnetic activity,是同位语，做插入语可以不管它。谓语是are visible……but have never……并列谓语。
例4：
Warning that computers in the United States are not secure, the National Academy of Sciences has urged the nation to revamp computer security procedures, institute new emergency response teams, creating a special nongovernment organization to take charge of computer security planning.
A creating a special nongovernment organization to take
B creating a special nongovernment organization that takes
C creating a special nongovernment organization for taking
D and create a special nongovernment organization for taking
E and create a special nongovernment organization to take
分析：
句首出现了 Warning ，doing结构在句子充当什么成分呢?现在没有出现在划线部分，先不管，the National Academy of Sciences是句子主语，has urged 是谓语，the nation to revamp出现了一个动词原形，后面 institute 又是一个动词原形，那么我们猜测会不会是动词原形的并列呢?往后看或发现有doing结构，虽然有SVO+逗号+doing,但是这个doing修饰的是前面的整个句子，指的是前面这个句子所导致的结构状语或者是逻辑主语是前面句子的主语，但是如果把 creating理解成doing结构做状语的话，那么institute 和revamp之前岂不是要加一个并列连接词吗?既然题干当中没有，那么creating就应该是一个并列的成分，应该用动词原形，所以ABC这三个选项都可以排除。剩下D和E选项也比较好排除， for taking 这里边是的是目的，我们表目的可以用to do 结构for something但是没有for doing的结构。所以排除D。
正确句子
Warning that computers in the United States are not secure, the National Academy of Sciences has urged the nation to revamp computer security procedures, institute new emergency response teams, and create a special nongovernment organization to take charge of computer security planning.
验证：
我们之前说过SVO，doing有两种理解，同样也可以有doing，SVO的结构。这样的话就只有一种理解，那就是逻辑主语就是句子的主语，那么 Warning 的逻辑主语应该就是the National Academy of Sciences，Warning只有还有一个that引导的宾语从句，从句的主语是computers ，in the United States介词短语当定语，谓语是 are， not secure是表语。
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