想要迅速提高GMAT语法考试成绩，考生就需要熟练掌握一些GMAT语法考试中的必备知识点，并在解题的过程中灵活运用。下面就来对GMAT语法考试中的必备知识点进行简单的介绍，希望能够为同学们备考GMAT语法考试带来帮助。
l OG 73. The British Admiralty and the War Office met in March 1892 to consider a possible Russian attempt to seize Constantinople and how they would have to act militarily to deal with them.
(A) how they would have to act militarily to deal with them 指代Russian attempt 错。
(B) how to deal with them if military action would be necessary if 从句中的“必要”语气，用should
(C) what would be necessary militarily for dealing with such an event 什么意思，表达不清
(D) what military action would be necessary in order to deal with such an event 对
(E) the necessity of what kind of military action in order to take for dealing with it wordy, 结构有错
l 句子中一个代词重复出现的指代原则-必须指同一物。银行和客户的题目。而且必须就近。
83. Any medical test will sometimes fail to detect a condition when it is present and indicate that there is one when it is not.
(A) a condition when it is present and indicate that there is one 第一个it 指代前面的condition 对，但是，不画线部分的it，就没有指代了，这就是and 并列后的有其它名词干扰(one)指代就近原则。不能说再指代到and 并列的前面去。
(B) when a condition is present and indicate that there is one detect 接物动词，后面要有宾语，如果是when 从句做宾语，变成了detect the timing
(C) a condition when it is present and indicate that it is present 都指代前面的condition, 而且 indicate that it is present 和后面的when it is not 形成句意上的清晰对比。
(D) when a condition is present and indicate its presence 后面不花线的it no referent
(E) the presence of a condition when it is there and indicate its presence
l 无指代。EST惯用：前面说国家，然后就直接说their 什么， 好像变成了前面说的是国民， 错。
OG- 133. In Holland, a larger percentage of the gross national product is spent on defense of their coasts from rising seas than is spent on military defense in the United States.
(A) In Holland, a larger percentage of the gross national product is spent on defense of their coasts from rising seas than is spent on military defense in the United States. 主语省略，变成了荷兰人花钱到美国人身上。
(B) In Holland they spend a larger percentage of their gross national product on defending their coasts from rising seas than the United States does on military defense. They 也是没头脑的。
(C) A larger percentage of Holland's gross national product is spent on defending their coasts from rising seas than the United States spends on military defense. 比较平行的问题
(D) Holland spends a larger percentage of its gross national product defending its coasts from rising seas than the military defense spending of the United States. 同上。
(E) Holland spends a larger percentage of its gross national product on defending its coasts from rising seas than the United States does on military defense. 对。