关于 not...but...词组的平行 --求助 O(∩_∩)O````` 谢谢！！

joshurman

首先，not...but...两个词后面的成分必须平行吗？ be not...but 和 be not...but be 都是正确的平行方式吗？

这个例句怎么解释：The agency is not a fully independent agency but instead derives it's authority from Congress.(note that the verbs" is" and "derives" )  Manhattan里面的一个例句，这里 not 和 but 后面的部分平行吗？ 还是只需要 is 和 derives 平行？

not a fully independent agency but a dependent one that derives it's authority from Congress 是不是更平行，更顺畅？

很困惑，谢谢

yiayia

Paleontologist Stephen Jay Gould has argued that many biological traits are not the products of
natural selection, favored due to their enhancement of reproduction or survival, but that they are
simply random by-products of other evolutionary developments.
(A) due to their enhancement of reproduction or survival, but that they are
(B) due to the reproduction or survival they enhance, but they are
(C) because they enhance reproduction or survival, but
(D) because they enhance reproduction or survival, but are
(E) because of enhancing reproduction or survival, but are
选D,这里but 后面are 不省略，因为but有可能为介词除了...,为了不引起歧义，必须写明。
59. (27573-!-item-!-188;#058&003208)
A new genetically engineered papaya was produced not by seed companies who have been


motivated by profit, which was the casewith most genetically modified crops previously approved



for commercial use, but university andUnited States Department of Agriculture researchers who



allowed growers to use it free of charge.




(A) produced not by seed companies whohave been motivated by profit, which was the case with



most genetically modified cropspreviously approved for commercial use, but



(B) produced not by profit-motivated seedcompanies, the case with most genetically modified



crops previously approved for commercialuse, but



(C) produced not by profit-motivated seedcompanies, as was the case with most genetically



modified crops previously approved forcommercial use, but by



(D) not produced by profit-motivated seedcompanies, which was the case with most genetically



modified crops previously approved forcommercial use, but was produced by



(E) not produced by seed companies whohave been motivated by profit, the case with most



genetically modified crops previouslyapproved for commercial use, but by


选C

joshurman

谁还能给举几个not...but...谓语平行的例子？谢谢

yiayia

这个要看具体的平行的句子成分吧，如果是be 动词后面的成分平行，就是be not but be(be省略保持简洁)。
OG上有一道状语平行的，结构是 be caused not by... but by。例句里平行的是谓语成分，所以可以这么写。楼主改写的句子明显啰嗦了，a dependent one和前面重复了。