如何去思考GMAT语法中的what从句是GMAT语法中的难点。
GMAT的SC考题中经常出现what从句，这是很多同学的痛点，带有what从句的选项有时候对，有时候错，基本没有很强的猜题规律的，需要我们在具体题目当中去判断。下面为大家讲讲该如何去思考GMAT SC中的what从句。
其实what从句就是一个名词性从句(看不懂这个术语的童鞋就忽略吧，并无大碍)，what我们称之为关系代词(看不懂的依然可以忽略)，既然是代词，一定要有所指代的，所以我们在判断what从句对还是不对，第一步就是找出what从句在句子当中语义上应该指代谁。
举个栗子：
What you said is right这句话里面what就是指代你说的话，所以这句话完全等同于The word that you said is right. 大家注意到没，后面的句子其实就是把what的指代对象the word直接给出了，然后加一个that(如果是人加who/whom)变成定语从句，这样句子是不是好理解很多。
没看懂??!!再来一个。
He is not what he was five years ago.还是一样首先找出what在句子当中指代什么，然后加上that/whom，其他部分照抄，所以这句话等同于He is not the man whom he was five years ago。
好啦，咱们再来几道真题：
The ancient Anasazi harvested such native desert vegetation as the purple-flowered bee plant, what they now commonly call wild spinach in northern Arizona and other parts of the southwestern United States.
A. what they now commonly call
B. a plant that they now commonly call
C. now commonly called
D. and is now commonly called
E. which it is now commonly called
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