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：
Ryunosuke Akutagawa’s knowledge of the literatures of Europe, China, and that of Japan were instrumental in his development as a writer, informing his literary style as much as the content of his fiction.
(A) that of Japan were instrumental in his development as a writer, informing his literary style as much as
(B) that of Japan was instrumental in his development as a writer, and it informed both his literary style as well as
(C) Japan was instrumental in his development as a writer, informing both his literary style and
(D) Japan was instrumental in his development as a writer, as it informed his literary style as much as
(E) Japan were instrumental in his development as a writer, informing both his literary style in addition to
选项分析：
(A)that of Japan were instrumental in his development as a writer, informing his literary style as much as
【错误】 平行结构：“that of”是多余的，它使得“Europe, China”和“that of Japan”三者概念不对等，因此无法用“and”平行在一起形成正确的“A，B，and C”结构。
(B)that of Japan was instrumental in his development as a writer, and it informed both his literary style as well as
【错误】 平行结构：见(A)中“平行结构”。不存在“both X as well as Y”的平行结构，应使用“both X and Y”。
(C)Japan was instrumental in his development as a writer, informing both his literary style and
【正确】 “Europe, China, and Japan”正确地形成了平行结构。“both his literary style and the content of his fiction”中“his literary style”和“the content of his fiction”，所以“both X and Y”结构使用正确。“informing……”是“was instrumental”的伴随状语，其逻辑主语同为“(Ryunosuke Akutagawa's)knowledge(of the literatures of Europe, China, and Japan)”，表意合理。
【大意】 Ryunosuke Akutagawa的欧、中、日文学知识对其最为作家的事业发展至关重要，既赋予其文风又赋予其故事内容。
(D)Japan was instrumental in his development as a writer, as it informed his literary style as much as
【错误】 平行结构：不存在“both X as much as Y”的平行结构，应使用“both X and Y”。
(E)Japan were instrumental in his development as a writer, informing both his literary style in addition to
【错误】 平行结构：不存在“both X in addition to Y”的平行结构，应使用“both X and Y”。
解题思路：
仅有(C)中却使用了平行结构——“literatures of Europe, China, and Japan”和“both his literary style and the content of his fiction”，因此选择(C)。
