很多同学表示对GMAT语法平行并列结构16字箴言之形式对称不理解，今天小编就为大家详细讲解一下，为了帮助大家熟练掌握，先从GMAT语法相关知识点讲起，附带例题希望能够加深同学们的理解。
一、形式对称的结构。
eg. I have not only studied math but also enjoyed my life.我不只在学习GMAT，而且也在享受生活。
分析：在这道题中，not only与but also所连两词形式上绝对对称，因为not only + studied，所以一定是but also + enjoyed。换为其它形式如“I not only have studied math but also have enjoyed my life.”也是可以的。
二、例题讲解。
上面一道题目的形式比较简单，下面为大家讲解一例较难的题，看看大家是否能从复杂的句子中察觉形式对称结构的用法。
Gasoline marketing is undergoing major changes as stations often not only add convenience stores but also combine with major fast-food chains to build complexes where customers can shop and eat as well as buy gasoline.
(A) not only add convenience stores but also combine with major fast-food chains to build
(B) not only add convenience stores but also they combine with major fast-food chains to build
(C) are not only adding convenience stores but also in combination with major fast-food chains they build
(D) add not only convenience stores, but also combining with major fast-food chains to build
(E) are not only adding convenience stores, but also in combining with major fast-food chains they build
答案：A
解析：本题为一道经典题目，大意是“汽油市场正在经受一些重要变化，就是加油站不仅增加了便利店，而且还结合了快餐店。建设复合式建筑群，使顾客可以停下来吃饭和加油。”划线部分我们看到not only……but also……句型。A选项形式是严格对称的，选项B not only+动词原型，but also+句子，形式不对称。选项C not only+V-ing，but also+介词短语，形式不对称。选项D not only+名词，but also+ V-ing，形式不对称。选项E not only+V-ing，but also+介词短语，形式不对称。综上分析，形式对称的只有A选项，所以正确答案为A。
也许，大家觉得以上题目比较简单，但是这样的题目必须要看出考察点才容易侦破，所以大家在GMAT考试中一定要保持考点的高度自觉。GMAT语法平行并列结构16字箴言之形式对称就为大家讲到这里了，16字箴言的其它内容前程百利小编还会为大家继续整理，敬请期待。
您还可能关注：
