求助prep 74_ but 后主语省略问题

chensong211

刚才在看prep的语法注解

首先是例句:
1. Intar has moved away from the Spanish classics and now draws on the works of contemporary
Hispanic authors.
2. Intar has moved away from the Spanish classics, and now it draws on the works of
contemporary Hispanic authors.
第一个句子中and前没有逗号,因此and连接的两个并列句中第二个并列结构应该省略重复的主语. 而
第二句子中and前有逗号,因此and连接两个独立的句子,每个句子都需要自己的主谓宾,因此第二个句
子中的it不能省略.


接着我看到第74题

74. (28503-!-item-!-188;#058&003635)
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

按照例句的方法，but前有逗号后面需要完整的主谓结构，所以就选了B。但这题答案是D，解释是:
(A) due to +动词的抽象名词形式,表达不够有效；not…but…连接的结构不平行。
(B) due to +动词的抽象名词形式,表达不够有效; they多余, 破坏了  sth/sb be not… but (be)…的结构
(C) but可能作为介词,产生because they enhance reproduction or survival, but simply random
by-products的歧意
(D) 正确，but are表明了but在这里只能作为连词,构成be not… but (be)…的平行结构
(E) because of +动名词形式,表达不够有效

我就纳闷了，既然是连词，前后又有逗号，为什么后面可以省略主语呢...

genius1824

说句简单的，我看这个句子 due to 肯定排除了，词组修饰不明确

不明白楼上说的省略主语省略什么了。这个是直接的平行结构题目。

chensong211

回LZ...

今天review prep语法，先看到那个例句说如果是连词，前面有逗号，后面要补充出来了主语。就是按照例句的话“1. Intar has moved away from the Spanish classics and now draws on the works of contemporary
Hispanic authors.
2. Intar has moved away from the Spanish classics, and now it draws on the works of
contemporary Hispanic authors.
第一个句子中and前没有逗号,因此and连接的两个并列句中第二个并列结构应该省略重复的主语. 而
第二句子中and前有逗号,因此and连接两个独立的句子,每个句子都需要自己的主谓宾,因此第二个句
子中的it不能省略.”

因此说Intar has moved away from the Spanish classics, and now draws on the works of contemporary Hispanic authors.就是不正确的，因为第二个动词前面有一个逗号，所以it就需要补充出来。

于是我就依葫芦画瓢做了下面那题，想着but和and一样是连词，but前面有个逗号，于是“想都没想”直接选了B. 所以就郁闷了。后来看解释发现是所谓的not be, but be格式。所以我觉得那个例句有点误导，是说but和and不一样呢，还是理论上Intar has moved away from the Spanish classics, and now draws on the works of contemporary Hispanic authors.不加it也是正确的...


希望我说明白了...

gdboy8888

我明白你的意思。。因为我正好也看到相同的问题了。。。。
07 PREP 语法笔记：

注意以下两个句子的区别:

1.Intar has moved away from the Spanish classics and now draws on the works of contemporary Hispanic authors.

2.Intar has moved away from the Spanish classics, and now it draws on the works of contemporary Hispanic authors.

第一个句子中and前没有逗号,因此and连接的两个并列句中第二个并列结构应该省略重复的主语. 而第二句子中and前有逗号,因此and连接两个独立的句子,每个句子都需要自己的主谓宾,因此第二个句子中的it不能省略.

08语法笔记：
223.(GWD-23-Q23)
After several years of rapid growth, the health care company became one of the largest health care providers in the metropolitan area, while it then proved unable to handle the increase in business, falling months behind in its payment to doctors and hospitals.

A.while it then proved unable to handle the increase in business, falling months behind in its payment to

B.while it then proved unable to handle the increase in business and fell months behind in its payment to

C.but then it proved unable to handle the increase in business, falling months behind in its paying

D.but then proving unable to handle the increase in business, falling months behind in paying(E)

E.but then proved unable to handle the increase in business, falling months behind in paying



选项分析：


E．Correct。Proved主动也可以表示被动，but后面省略了it，因为主语相同。

补充说明：
but后面本来是应该加句子的，但是在主语相同的情况下可以省略主语。

这里的补充说明感觉跟07版矛盾了啊。。。搜索了一下，多数是强调并列句子时第二个主语可以省略，但是这里不是并列句子，而是but链接的两个独立句子，按照07的说法，是不能省的吧？

chensong211

找到了一个例子 新prep 197， 答案是D，把it补充出来了

197.(GWD-8-Q20)

Not only did the systematic clearing of forests in the United States create farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also caused erosion and very quickly deforested whole regions.

A. Not only did the systematic clearing of forests in the United States
create farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also
B. Not only did the systematic clearing of forests in the United States
create farmland (especially in the Northeast), which gave consumers relatively inexpensive houses and furniture, but also
C. The systematic clearing of forests in the United States
, creating farmland (especially in the Northeast) and giving consumers relatively inexpensive houses and furniture, but also
D. The systematic clearing of forests in the United States
created farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also
E. The systematic clearing of forests in the United States
not only created farmland (especially in the Northeast), giving consumers relatively inexpensive houses and furniture, but it

LoveY

我明白你的意思。。因为我正好也看到相同的问题了。。。。
07 PREP 语法笔记：
注意以下两个句子的区别:
...
gdboy8888 发表于 2012-1-6 06:36

    有相同疑问。不是很明白。
另外，此题为什么不能选c呢？07prep解释的似乎不是很在理。
be not..., but be可以这样用？