求助OG13关于SO..AS TO 的说法

bino

SC第39题，选项C 用了 so...as to结构为错，官方解释是"The construction ‘so x as to y' is not correct idiom"， 这意思是说如今“so as to” 无论如何都是错误的结构吗？
原题是：
Although schistosomiasis is not often fatal, [划线始]it is so debilitating that it has become an economic[划线止] drain on many developing countries.
A. it is so debilitation that it has become an economic
B. it is of such debilitation, it has become an economical
C. so debilitation is it as to become an economic
D. such is its debilitation, it becomes an economical
E there is so much debilitation that it has become an economical

答案选A.

kiwifoodtown

so as to 不能倒装，以前讨论过。

bino

啊 谢谢~~  我也是认为倒装不对，但是看了他的解释就觉得懵了。

meimeijulia

我觉得：1. so 后面应该跟adj 而不应跟n
            2. 根据PREP08语法，“因为修饰成分离被修饰词过远会造成修饰不清，所以to be/do结构不能与前面动词不能太远。”我认为中间不应插入"is it"