og16 34 so...as to

Zeeee15

Although schistosomiasis is not often fatal, it is so debilitating that it has become an economic drain on many developing countries.                                    

• Ait is so debilitating that it has become an economic  
• Bit is of such debilitation, it has become an economical  
• Cso debilitating is it as to become an economic  
• Dsuch is its debilitation, it becomes an economical  
• Ethere is so much debilitation that it has become an economical
  

BDE就不用说了，AC我看现在KM大家也没讨论出来，求解释

看到一种说法so...as to do是不对的结构，只能用so...as to be adj 求证时有没有这两种用法

大鸽子

贴一段Manhattan的回答，他认为倒装才是问题的核心
The OG explanation then says that so x as to y is not a correct idiom.

However, in my view answer choice C could have been written correctly as:

it is so debilitating as to become an economic drain on many developing countries.

In my view, the GMAT recognized that this answer choice, as re-written above, would have been correct. Thus, it reordered the words in this answer choice to make this incorrect.

In my opinion, the answer choice explanation is incorrect as to rule out the possibility of so X as to Y as an idiom, and this answer choice is wrong largely because of poor word order. I would not rule out an answer choice that uses this idiom, and regard is as an appropriate possibility.

同时楼主还查过so。。 as to的用法
Where as in one of the question "Police Escoret" from MGMAT Sentence Correction Question Bank I see the exaplaination suggest that so X as to Y is a correct idiom.
而且在OG10 sc88 中出现过此用法，所以本题症结应该不在idiom

我不是爱生气

RON大神对so……as to用法的解释：
nevertheless, i think i can give you some sort of explanation: in general, you don't use so ADJ as to VERB unless the VERB describes some sort of state/condition. i.e., if the verb is an action verb, this construction generally isn't used.
for instance,
i am so ugly as to be viscerally repulsive to women. --> this works, because the verb "to be" describes a state/condition.
i am so ugly as to repel women on sight. --> you generally wouldn't see this in good writing, as "repel" is an action verb; the sentence would probably be written as i am so ugly that i repel women on sight.