一点语法问题Evidently,however,theblindnotonlyfiguredoutmeaningsforeachlineofmotion,butasagrouptheygenerallycameupwiththesamemeaningatleastasfrequentlyasdidsightedsubjects.这句子里面but后面为什么省略了

Question

一点语法问题
Evidently,however,the blind not only figured out meanings for each line of motion,but as a group they generally came up with the same meaning at least as frequently as did sighted subjects.这句子里面but 后面为什么省略了also?还有最后为什么是did在前,部分倒装吗?这种部分倒装怎么个用法?

Answer 1

首先,not only...but also ...结构中的also可以省略.
其次,在as.as.结构中第二个as所引导的比较状从中,如果谓动是用助动词来指代与前面相同的动词(如此句中的did=came up with the same meaning ),就可以完全倒装.有点类似于:So+助动词+主语.
因此but as a group they generally came up with the same meaning at least as frequently as did sighted subjects.可原还成:
but as a group they (also) generally came up with the same meaning at least as frequently as sighted subjects came up with the same meaning .但不如倒装句简洁.
句意:然而,很明显,盲人不仅能够搞清楚每种运动线条所代表的意义,而且作为一个小组,她们达成共识的频率也不比视力正常的实验对象低.