OG-22 关于平行结构中的主语省略？

22.   The voluminous personal papers of Thomas Alva Edison reveal that his inventions typically sprang to life not in a flash of inspiration but evolved slowly from previous works.

(A) sprang to life not in a flash of inspiration but evolved slowly

(B) sprang to life not in a flash of inspiration but were slowly evolved

(C) did not spring to life in a flash of inspiration but evolved slowly

(D) did not spring to life in a flash of inspiration but had slowly evolved（C）

(E) did not spring to life in a flash of inspiration but they were slowly evolved

C, the best choice, places not and but in such a way that the distinction between springing to life in a flash of inspiration and evolving slowly is logically and idiomatically expressed. A and B are faulty because, for grammatical parallelism, not in a flash... must be followed by but in..., not by a conjugated form of the verb. Moreover, were slowly evolved is incorrect in B because evolve, in this sense of the word, cannot be made passive. Choices C, D, and E all correctly place not before spring. D, however, contains inconsistent verb tenses; E contains the faulty passive and an intrusive they.

我想问问OG解释的最后一句是一个通用的原则吗？ 是不是同一主语的两个动作并列，如sb do A and sb do B，中的后一个sb必需省略呢？

同一主语用SVO and SVO是属于run-on的错误，OG中即有反例。

另外类似的句子结构一般有（and可以换成其它意思的连词比如yet/but）：

同一主语的两个句子：

OG22，也是在从句中哦（that引导的宾语从句），那是不是SVO and SVO就不算是run－on呢？

那为什么OG22解释的最后一句说they的加入是错误呢？ 是不是像Ring说的，因为 SVO and SVO 中如果两个主语是同样的，那无论在从句还是主句中，第二个主语必须要省略。能不能这样理解呢？请版主指点