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：
Australian embryologists have found evidence that suggests that the elephant is descended from an aquatic animal, and its trunk originally evolving as a kind of snorkel.
(A) that suggests that the elephant is descended from an aquatic animal, and its trunk originally evolving
(B) that has suggested the elephant descended from an aquatic animal, its trunk originally evolving
(C) suggesting that the elephant had descended from an aquatic animal with its trunk originally evolved
(D) to suggest that the elephant had descended from an aquatic animal and its trunk originally evolved
(E) to suggest that the elephant is descended from an aquatic animal and that its trunk originally evolved
选项分析：
(A)that suggests that the elephant is descended from an aquatic animal, and its trunk originally evolving
【错误】 平行结构：“its trunk originally evolving as a kind of snorkel”与“that the elephant is descended from an aquatic animal”语法结构不一致，无法用“and”平行在一起。
(B)that has suggested the elephant descended from an aquatic animal, its trunk originally evolving
【错误1】 平行结构：“its trunk originally evolving as a kind of snorkel”本应是与“the elephant descended from an aquatic animal”平行，而不是将前者以独立主格形式做前者的状语。
【错误2】 固定搭配：“descend from”和“be descended from”表意不同，前者表意为“从……降下”，后者表意为“是……的后代”。
(C)suggesting that the elephant had descended from an aquatic animal with its trunk originally evolved
【错误1】 平行结构：类似地，见(B)中“平行结构”。
【错误2】 固定搭配：类似地，见(B)中“固定搭配”。
(D)to suggest that the elephant had descended from an aquatic animal and its trunk originally evolved
【错误】 平行结构：“its trunk originally evolved……”之前的“that”被省略了，但这并不合理。因为如果省略“that”，读者无法判断这一主谓结构是与“the elephant had descended from an aquatic animal”平行，还是与“Australian embryologists have found evidence that……”平行。
(E)to suggest that the elephant is descended from an aquatic animal and that its trunk originally evolved
【正确】 正确地使用了“be descended from”的固定搭配，表达了“是……的后代”的合理含义。“that the elephant is descended from an aquatic animal”和“that its trunk
originally evolved as a kind of snorkel”两个从句用“and”平行，共同作为“suggest”的具体内容。
【大意】 澳大利亚胚胎学家发现证据表明大象是一种水生动物的后代，其鼻子原本从一种潜水器官演化而来。
解题思路：
根据平行结构的要求，一次性排除(A)、(B)、(C)、(D)，因此选择(E)。
