are not...but (be)...的结构

二尾鱼 · 发表于 2017-7-10 20:26:48

题目：

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

正确答案是（D）because they enhance reproduction or survival, but are

答案中many biological traits are not the products of natural selecion,...,but are simply random by-prodects的结构让我很疑惑，不是要平行吗？not 后面跟的是名词“the products”，为什么but后面跟着“are”？

请教大家！谢谢～～

fxxxfxxx · 发表于 2017-7-10 21:15:17

请给出完整的题目

二尾鱼 · 发表于 2017-7-10 21:38:37

fxxxfxxx 发表于 2017-7-10 21:15
请给出完整的题目

嗯嗯！我表达的好像不清楚，我重新编辑一下。

fxxxfxxx · 发表于 2017-7-10 21:56:25

are not the products, but are by products 没什么问题啊

你的逻辑我没明白，这里就是简单的svo结构啊

爱喝水的小仙女 · 发表于 2017-7-11 00:51:53

马一下，同想知道
not....but....不是封闭式平行结构嘛

二尾鱼 · 发表于 2017-7-11 07:40:12

fxxxfxxx 发表于 2017-7-10 21:56
are not the products, but are by products 没什么问题啊

你的逻辑我没明白，这里就是简单的svo结构啊 ...

not...but...不是平行结构吗

fxxxfxxx · 发表于 2017-7-11 08:37:37

二尾鱼发表于 2017-7-11 07:40
not...but...不是平行结构吗

哦，我才明白你的意思。这里but后面是和前面的句子平行的，但是并没有你说的那种not 和 but后面要平行的要求，not 和 but也不是什么固定搭配。

Yvonne514 · 发表于 2021-6-28 13:54:54

• "not X but Y":
this construction implies that X is what's "normal" or "expected", and that Y is what's actually true.
e.g.,
I was surprised to learn that Ella was not Clint's biological daughter but in fact his adopted daughter, since her facial features so closely resemble his.
(here, since the girl looks so much like her dad, we EXPECT to find out that she's his biological daughter.)

• "X but Y":
this just implies a contrast, but NOT any expectation.
(in THIS PARTICULAR sentence—as already explained in this thread—the "X" part includes the word "not".)
e.g.,
I am not a mechanic, but can perform basic maintenance on non-hybrid cars.

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