GMAT语法要求考生从选项中选出一个最佳答案，这个最佳答案有可能是几个正确选项中选一个最好的，也可能是在几个都不是完美的选项中选出相对较好的，今天我们就给大家说一下考前突破GMAT语法知识点之方法总结。
GMAT语法常见考点错误点有三种，
1、习语：习语特别多，只能背
2、相对错误：简洁有效，词性选择(VAN/情态助动词只有may和might可以互换，别的都不可以/语义/简洁)，逻辑意义
3、绝对错误：主谓一致/平行并列/代词/修饰/时态/比较/标点。
先用绝对错误排除选项，其次在考虑相对错误。
看一下这些在题目当中的应用。
例1：习语：
Byron possessed powers of observation that would have made him a great anthropologist and that makes his letters as a group the rival of the best novels of the time.
(A) makes his letters as a group the rival of
(B) makes his letters as a group one to rival
(C) makes his letters a group rivaling
(D) make his letters as a group the rival of
(E) make his letters a group which is the rival of
分析：Byron possessed powers of observation that 出现了that定语从句，因为是在未划线部分所以肯定是正确的。 and that 这个that就是并列部分的内容，也就是说题干当中是that and that。第一个that先行词是powers of observation，如果定语从句的先行词是名词1+介词+名词2 的结构的话，那么that指代的需要根据句意来判断。句子意思说“使得它成为伟大的人类学家”那么能够使得他成为伟大的人类学家到底是powers能力还是observation 观察还是powers of observation观察力呢?所以that指代的就是这个介词短语观察力，那么第二个that指代的也应该是观察力，那么根据谓语动词判断ABC就是错误的， 剩下两个选项是关于make的使用，所以这道题考察了习语，我们先来了解一下make的考点：
Make 名词1 +名词2
Make 名词+形容词
Make it +形容词+to do something
E选项单独的which引导非限定性定语从句，which前面需要加逗号，所以E选项排除。最后只剩下D选项，但是D选项出现了as a group，那么这个到底是什么成分呢?
这里的as并不是make as 而是as a group介词短语做定语修饰的是 letters，D选项考察的就是Make 名词1 +名词2这个用法。这就是习语的考察，这个习语只能是大家在平时多积累多注意多背诵了。
例2：相对错误
Diabetes, together with its serious complications, ranks as the nation's third leading cause of death, surpassed only by heart disease and cancer.
A ranks as the nation's third leading cause of death, surpassed only
B rank as the nation's third leading cause of death, only surpassed
C has the rank of the nation's third leading cause of death, only surpassed
D are the nation's third leading causes of death, surpassed only
E have been ranked as the nation's third leading causes of death, only surpassed
分析：
Diabetes, 是主语，后面出现了its 代词，ranks是谓语，对比五个选项，根据its就算是不认识 Diabetes, 也可以知道这是个单数，所以复数谓语动词的选项都可以排除，所以BDE排除。最后只剩下AC，找差异。A选项是ranks 是动词，C选项是 has the rank of是个名词，根据VAN词性优越性选择，我们知道动词优于形容词优于抽象名词。所以C有相对错误。答案是A。
例3：绝对错误(比较)
In his eagerness to find a city worthy of Priam, the German archaeologist Schliemann cut through Troy and uncovered a civilization a thousand years older as was the city Homer’s heroes knew.
(A) older as was the city Homer’s heroes knew
(B) more ancient than the city known to Homer’s heroes
(C) older than was the city known to Homer’s heroes
(D) more ancient of a city than Homer’s heroes knew
(E) older of a city than was the one known to Homer’s heroes
分析：
In his eagerness to find a city worthy of Priam介词短语做状语在句首，
the German archaeologist Schliemann是句子主语，cut through 谓语，and uncovered并列谓语动词2uncovered，后面是划线部分， older as是错误的，因为形容词比较级的话应该跟的是than而不是as,第二个问题是 was，我们知道见到比较看对象，对象通常不可比，比较对象当中助动词的补出是be动词，那么一定要满足句子的谓语动词是be动词才可以。这个句子的谓语是cut through and uncovered，都是实义动词，所以即便补充助动词也应该是do的形式。所以看一下选项，A选项as错误，was错误。B选项没有补出助动词，C选项补出了was错误。D没有补出助动词，E补出was错误。D选项比较的对象是Homer’s heroes knew，是一个完整的句子，但是根据句意理解两部分比较不合理，没有对比之处。剩下B选项，than后面比较的是city，前面的比较对象是Troy 。其实句子结构是Troy(特洛伊，是个城市) more ancient than the city known to Homer’s heroes。civilization 是抽象名词不能和city这个具体名词比较，只有抽象名词和抽象名词，具体名词和具体名词才能互相比较。
以上就是关于考前突破GMAT语法知识点之方法总结的内容介绍，希望考生通过以上内容，不断夯实自己的知识点，熟练做题技巧，提升解题能力以及分析能力，争取都能取得理想成绩。
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