[求助] LZM 11-16 (P203) (so that, so as to)

Mchao_l

14.    Although one link in the chain was demonstrated to be weak, but not sufficiently so to require the recall of the automobile.
(A) demonstrated to be weak, but not sufficiently so to require
(B) demonstrated as weak, but it was not sufficiently so that it required
(C) demonstrably weak, but not sufficiently so to require
(D) demonstrably weak, it was not so weak as to require
(E) demonstrably weak, it was not weak enough that it required

答案D: 用了so .. as to.
但B为什么不对. 用了so that.
so .. as to 和so that, so...that 的使用原则是什么, 如何区分.
谢XDJM们指点.谢过.

chenmoon

句子前面用了although,后面就不用but了
so ... as to用在简单的系表结构中, 而且结果状语的主语要与主句主语一致。
因为so...that可以在很多的复杂的结构中使用，所以比较常见，但并不是说so ... as to就一定是错的。

chenmoon

so that应该是“为的是，以便”的意思，比如 I gave him a little food so (that) he wouldn't get hungry.

感觉这里的that可以省略，要不要都行吧。不知道对不对，请大侠指点。