大家来看看这个manhattan上面的句子

牛掰

不管了，再写一遍，就当顶帖子了！其实CD上还有好多悬而未决的帖子啊，有一天我是牛牛的话，真希望能把他们都解决掉……嗨，什么时候才能成为牛牛呢~
额，这个题，我是这么想的。
首先，确定的是，他考察是not……but……并列问题。
但是由于前面的否定句子，因为语言习惯问题，not习惯放在have后边，就是have not been, 所以看起来貌似不是很严格的平行！

328521108

首先确定这个题答案的原样。。。
15. Dr. Crock’s claims [HAVE (not) BEEN 【CORROBORATED by other scientists or PUBLISHED
in a prestigious journal] (but) HAVE nonetheless GARNERED a great deal of attention from the
public].
我们大家的疑惑应该都集中在为什么不是“not have been corroborated"而是”have not been",这样明显的不太平行了啊！
引用一个GMAT专家的回答：有一个叫Saurabh的小朋友和我们一样纠结。。。
Hi Saurabh,

You ask an interesting question (not a silly one), but the answer is that the correction on pg. 61 is accurate.

To begin with, the parallel verb in both clauses is "have," so beginning with "have" both times is essential.

Another example:

I have been to Paris, but I have not eaten snails.

Additionally, the word "not" never precedes the main verb. We say "I have not," "I do not," etc., and never "I not have" or "I not do." If not precedes these words, it is because it is modifying a preceding verb:

I do not have time to eat lunch.
I do not do yoga.

The "not x but y" structure you mentioned is used in many contexts, but is not generally used to compare main verbs. Here are a few examples:

The drug is not helpful, but harmful.

It's not what you say, but what you do that matters.
(Note that here "not" precedes "what," which is a pronoun.)

The best course of action is not to wait for someone else to make a change, but to make that change yourself.
(Note that "not" can precede an infinitive. The main verb here is "is," and the infinitives are used to describe two contrasting courses of action.)

_________________
Dmitry Farber
Manhattan GMAT Instructor

328521108

328521108 发表于 2014-1-18 12:16
首先确定这个题答案的原样。。。
15. Dr. Crock’s claims [HAVE (not) BEEN 【CORROBORATED by other scie ...

我把这个学生原本的问题也附在这里，大家自己看一下吧。
Hi Experts,

I know i am asking a very silly question, but seriously i want to clear my doubt on this one.

The following sentence is from chapter no. 4 and on page no. 60 of SC-4th edition.

15. Dr. Crock's claims have been not corroborated by other scientists or published in a prestigious journal but have nonetheless garnered a great deal of attention from public.

Answer is on page no. 61:-

Dr. Crock's claims have not been corroborated by other scientists or published in a prestigious journal but have nonetheless garnered a great deal of attention from public.


The right parallel structure is Not X but Y, but in this sentence the structure is different. It says:-

have not been corroborated but have nonetheless
not X but Y

X and Y should be parallel. So, i believe sentence should be:-

Dr. Crock's claims not have been corroborated by other scientists or published in a prestigious journal but have nonetheless garnered a great deal of attention from public.

Please correct me if i am wrong.