GMAT语法题，又称句子改错题(sentence correction)，是整个GMAT考试中对考生英语语法能力考查要求最高的题型，也往往是中国学生最为头疼的一类题目。没有扎实的语法基础和一定的逻辑分析能力，想要做好语法题难度极高。怎样做好GMAT语法题?下面小编就通过一些经典真题的实例解析，为大家全面讲解GMAT语法题的解题思路和方法技巧。
实例题目：
Rising inventories, when unaccompanied correspondingly by increases in sales, can lead to production cutbacks that would hamper economic growth.
(A) when unaccompanied correspondingly by increases in sales, can lead
(B) when not accompanied by corresponding increases in sales, possibly leads
(C) when they were unaccompanied by corresponding sales increases, can lead
(D) if not accompanied by correspondingly increased sales, possibly leads
(E) if not accompanied by corresponding increases in sales, can lead
选项分析：
(A)when unaccompanied correspondingly by increases in sales, can lead
【错误】 修饰成分：“correspondingly”，即“相应地”，是副词。副词无法修饰名词，因此“correspondingly”只能修饰“unaccompanied by”，意思是“没有相应地被……陪伴”。相比之下，(E)使用“corresponding”修饰“increase”，意思是“相应的增长”，表意优于本选项。
(B)when not accompanied by corresponding increases in sales, possibly leads
【错误】 主谓一致：leads的主语是“rising inventories”，“rising”(上升的)是“inventories”(存货)的形容词，主语核心词“inventories”与“leads”主谓不一致。
(C)when they were unaccompanied by corresponding sales increases, can lead
【错误】 动词时态：主句谓语动词是“can lead”是真实语气一般现在时，因此“when”引导的时间状语从句没有理由出现“were”(一般过去时或虚拟语气)。
(D)if not accompanied by correspondingly increased sales, possibly leads
【错误】 主谓一致：见(B)。
修饰成分：见(A)。
(E)if not accompanied by corresponding increases in sales, can lead
【正确】 “corresponding”修饰“increases”合理表达了“相应的增加”的含义。“can lead”与其主语“Rising inventories”形成了正确的主谓结构。
【大意】 增长的存货如果没被伴有相应的销售额的增加，可能导致产量缩减，影响经济增长。
解题思路：
“leads”的形式违反了主谓一致，立即排除(B)和(D)，(C)中“were”时态有问题，应排除。
(A)和(E)需要结合修饰语的知识进行语义分析，对比后发现(E)用“corresponding”修饰“increase”比用“correspondingly”修饰“unaccompanied by”更加合理，因此选择(E)。
