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：
Among the objects found in the excavated temple were small terra-cotta effigies left by supplicants who were either asking the goddess Bona Dea’s aid in healing physical and mental ills or thanking her for such help.
(A) in healing physical and mental ills or thanking her for such help
(B) in healing physical and mental ills and to thank her for helping
(C) in healing physical and mental ills, and thanking her for helping
(D) to heal physical and mental ills or to thank her for such help
(E) to heal physical and mental ills or thanking her for such help
选项分析：
(A)in healing physical and mental ills or thanking her for such help
【正确】 “Bona Dea's aid in healing physical and mental ills”正确地使用了“aid sb. in doing sth.”的固定搭配(aid作名词时也和“in”搭配)。“either asking……or thanking……”正确地使用了“either X or Y”的平行结构。
【大意】 出土的寺庙中发现了香客留下的陶俑，这些香客要么在求女神Bona Dea帮助治病要么在感谢她的帮助。
(B)in healing physical and mental ills and to thank her for helping
【错误】 平行结构：“in healing”和“to thank”语法功能不一致，无法用“and”平行在一起，且“either”本应与“or”而不是“and”搭配使用。
(C)in healing physical and mental ills, and thanking her for helping
【错误】 平行结构：“either”本应与“or”而不是“and”搭配使用。
(D)to heal physical and mental ills or to thank her for such help
【错误】 平行结构：“to thank”本意上应与“asking”平行，而不是与“to heal”平行。
(E)to heal physical and mental ills or thanking her for such help
【错误】 固定搭配：不存在“aid sb. to do sth.”的用法，应使用固定搭配“aid sb. in doing sth.”。
解题思路：
根据平行结构的要求能够立即排除(B)、(C)、(D)。
不存在“aid sb. to do sth.”的用法，所以排除(E)。
因此选择(A)。
本题不可避免要运用固定搭配的知识。
