GMAT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，想要做好句子改错题难度极高。如何提升GMAT句子改错题的解题能力?下面小编就为大家整理了一些经典例题，结合实例分析为大家讲解GMAT句子改错题的解题思路和方法技巧。
实例题目：
Dressed as a man and using the name Robert Shurtleff, Deborah Sampson, the first woman to draw a soldier’s pension, joined the Continental Army in 1782 at the age of 22, was injured three times, and was discharged in 1783 because she had become too ill to serve.
(A) 22, was injured three times, and was discharged in 1783 because she had become
(B) 22, was injured three times, while being discharged in 1783 because she had become
(C) 22 and was injured three times, and discharged in 1783, being
(D) 22, injured three times, and was discharged in 1783 because she was
(E) 22, having been injured three times and discharged in 1783, being
选项分析：
(A)22, was injured three times, and was discharged in 1783 because she had become
【正确】 “was injured three times”和“was discharged in 1783”用“and”平行没有问题。过去完成时的“she had become”表明“become too ill to serve”发生在“was discharged in 1783”之前，表意合理，而“was injured three times”和“was discharged in 1783”虽然平行，但两者并不一定是同时发生的。
【大意】 化装为男性并化名Robert Shurtleff，Deborah Sampson，第一个提取军人养老金的女性，于1782年在她22岁时加入欧陆军，受伤3次，并在1783年复员因为她已经病的太重而不能服役了。
(B)22, was injured three times, while being discharged in 1783 because she had become
【错误1】 句子结构：“joined the Continental Army”和 “was injured three times”同为“Deborah Sampson”的谓语动词，两者之间没有任何如“and”、“or”、“but”之类的连接。
【错误2】 句子意思：“while being discharged”大意为“当正在退伍的时候”，是“was injured three times”的时间状语，然而根据日常逻辑可知“Deborah Sampson”并不是当正在退伍的时候负伤三次的。
(C)22 and was injured three times, and discharged in 1783, being
【错误1】 平行结构：“discharged”单独使用不是谓语动词，因此无法同 “joined the Continental Army in 1782 at the age of 22 and was injured three times”形成平行结构。
【错误2】 修饰成分：“being”伴随修饰“was injured”，与之同逻辑主语且同时发生，然而“too ill to serve”是“discharged”的原因，而并非其伴随修饰语。
(D)22, injured three times, and was discharged in 1783 because she was
【错误】 平行结构：“injured”本意上是被动，单独使用不是谓语动词，因此无法同 “joined”和“was discharged”形成平行结构。
(E)22, having been injured three times and discharged in 1783, being
【错误1】 平行结构：“joined”、“having been injured”和“discharged”语法功能不一致，无法用“and”平行在一起。
【错误2】 修饰成分：见(C)中【错误2】。
解题思路：
(B)、(C)、(D)、(E)要么句子结构有问题，要么不平行，立即排除。因此选择(A)。
