知其然才能知其所以然!所以，攻克gmat语法的第一步，就是了解gmat语法考点!下面是小编为大家整理收集的关于gmat语法考点的相关详解，仅供大家参考。
一、平行结构
1、定义：平行结构就是要求句子当中，可比较的句子成分(Comparable sentence parts)必须在结构上和逻辑上相似。
2、解题注意：做题的时候要注意遵循“形式对称、概念对等、功能相同、意思单一”这四大原则。
3、标志词：and /or/ but yet / both and / not only but also/ either or/not but， rather than ，not X but (rather) Y ，more X than Y, the same to X as to Y
4、例题： There are several ways to build solid walls using just mud or clay, but the most extensively used method has been the forming of bricks out of mud or clay, and, after some preliminary air drying or sun drying, they are laid in the wall in mud mortar.
(A) the forming of bricks out of mud or clay, and, after some preliminary air drying or sun drying, they are laid
(B) forming the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them
(C) having bricks formed from mud or clay, and, after some preliminary air drying or sun drying, they were laid
(D) to form the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them
(E) that bricks were formed from mud or clay, which, after some preliminary air drying or sun drying, were laid
解析：由日常逻辑判断可知，“the forming of bricks out of mud or clay”和“they(bricks) are laid”用“and”连接，其实是砌墙的两个步骤，其逻辑含义应该是平行的，但语法结构上两者并不平行。 (A)、(B)、(C)、(D)中只有(D)平行，且平行结构的语义很合理。 (E)不用平行，且“which引导的从句”跳跃修饰，因此选择(D)。
二、比较结构
1、定义：比较结构指一个人、事、物与另一个人、事、物或几个人事物之间就行为、性质、特征进行比较，也可以是数量上的比较和对比。
2、解题注意：做题的时候要注意gmat逻辑概念是否可以比较，比较点双方是否存在并且是否可以比较;比较双方是否形式一致，比较是否清晰。
3、标志词： than, Like, Unlike, More than, Less than, Faster than, different from, in contrast with/to, Compare to, as, as (adj.) as, as much as, as fast as, the same as.
4、例题：Like the idolization accorded the Bront?s and Brownings, James Joyce and Virginia Woolf are often subjected to the kind of veneration that blurs the distinction between the artist and the human being.
(A) Like the idolization accorded the Bront?s and Brownings,
(B) As the Bront?s’ and Brownings’ idolization,
(C) Like that accorded to the Bront?s and Brownings,
(D) As it is of the Bront?s and Brownings,
(E) Like the Bront?s and Brownings,
解析：“like”是比较结构的标志，要求两边的比较对象要平行可比，“as”单独使用连接名词性结构时表达的含义并非比较，而是“作为”，由于比较对象不可比，立即排除(A)、(B)和(C)。看见代词找指代(D)中代词“it”无所指代，立即排除。因此选择(E)。
三、代词考点
1、标志词：it，its，they，them;that，those和which
2、解题注意：如果划线部分有代词，接下来就要:判断先行词是否存在;先行词是否唯一，一个代词只能指代一个先行词;先行词和代词是否符合逻辑意义。即句子结构是否合理，是否通顺，意思表达是否清楚;先行词与代词的单复数是否一致，一一对应。另外，that，those等词也可以指代前面的名词，但一定要有修饰成分，不能单独指代名词。还有，it与which不能指代前面整件事整句话的意思。
四、动词的时态
1、标志词：
过去时：originally, from 1978 to 1985,previously
完成时态：since; within/during/over/in+the past/last/recent+时间短语
将来时：possibility that…/likelihood that…/expect that…标准书面语中,优先使用一般将来时,主观将来时用be supposed to do,较少用be going to do,不用be to be doing/be to be done
一般现在时：common， the most common reasons, the common procedure
过去完成时(这是个易错点)的使用：必须在语义上有时间的对照(不一定会有一般过去时的出现)，来反映出发生在过去的过去。
2、例题：Carnivorous mammals can endure what would otherwise be lethal levels of body heat because they have a heat-exchange network which kept the brain from getting too hot.
(A) which kept
(B) that keeps
(C) which has kept
(D) that has been keeping
(E) having kept
解析：动词时态：由日常逻辑可知，句子的本意是介绍肉食动物能忍受高温的科学原理，因此“keep”最合理的时态应该是一般现在时。一般现在时可以表示现在的日常情况，也可以用于一般的无时间特征叙述，本题的情况属于后者，因此(B)的一般现在时表意更优。答案是B
五、逻辑主语和主谓一致
1、定义：位于句首的doing或done的动作发出者或承受着即为逻辑主语，逻辑主语等于主句主语。逻辑主语判断完之后，紧接着gmat语法要注意的就要注意单复数的情况，也就是主谓一致问题。
2、解题注意：主谓一致考察的时候要注意四个原则，
1)随前一致原则就是谓语动词与前面的名词保持一致。常见的结构为A with B，其中B为伴随词，以A决定主谓。
2)随后一致原则是指谓语动词与前面的名词保持一致。常见结构为not only A but also B，其中A为伴随词，以B决定主谓。
3)就近原则就是指以靠近的名词决定主谓，常见结构，there be。
4)A and B原则是指当A and B出现时，所用谓语为复数。