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旧PREP 语法20题

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楼主
发表于 2010-2-24 22:00:13 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
The hognose snake puts on an impressive bluff, hissing and rearing back, broadens the flesh behind its head the way a cobra does, feigning repeated strikes, but, having no dangerous fangs and no venom, eventually, if its pursuer is not cowed by the performance, will fall over and play dead.
正确答案将划线部分换成了broadening the flesh behind its head the way a cobra does and feigning repeated strikes, but it has no dangerous fangs and no venom, and
这里hissing and rearing..., broadening...and feigning...三个doing结构并列,在and前面为什么不加逗号呢
而A选项:broadens the flesh behind its head the way a cobra does, feigning repeated strikes, but, having no dangerous fangs and no venom,
puts..., broadens..., but ...will fall...and play...这样的谓语并列不行吗?
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沙发
发表于 2010-6-25 10:58:06 | 只看该作者
同问为什么不加逗号??
板凳
发表于 2012-5-20 15:13:41 | 只看该作者
同问:
hissing and rearing..., broadening...and feigning...三个doing结构并列,在and前面为什么不加逗号?
地板
发表于 2012-5-20 20:11:26 | 只看该作者
为何要加逗号呢? A, B and C的结构只需要A和B之间加逗号啊.
5#
发表于 2012-5-23 15:27:03 | 只看该作者
为何要加逗号呢? A, B and C的结构只需要A和B之间加逗号啊.
-- by 会员 aeoluseros (2012/5/20 20:11:26)



斑竹,下面都是A, B, and (or) C的例子。
OG-15:
Warning that computers in the United States are not secure, the National Academy of Sciences has urged the nation to revamp computer security procedures, institute new emergency response teams, and create a special nongovernment organization to take charge of computer security planning.

OG-17
The commission has directed advertisers to restrict the use of the word “natural” to foods that do not contain color or flavor additives, chemical preservatives, or anything that has been synthesized.
6#
发表于 2012-5-23 16:37:10 | 只看该作者
请问下面OG-6题中 salt
from the stone was crystallizing and fungus was growing on the walls 中间and之前没什么没有逗号呢?

moisture exhaled by tourists had raised
the humidity within them to such levels that salt
from the stone was crystallizing and fungus
was growing on the walls.

还有OG-11和24,为何这里的and和or之前加了逗号呢?不是只有A和B,应该不需要加逗号。

11.the most extensively used method has been to form the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them in the wall in mud mortar. 24. dioxin induces the production of enzymes that are the organism's attempt to metabolize, or render harmless, the chemical irritant.
7#
发表于 2012-5-24 06:28:13 | 只看该作者
为何要加逗号呢? A, B and C的结构只需要A和B之间加逗号啊.
-- by 会员 aeoluseros (2012/5/20 20:11:26)






斑竹,下面都是A, B, and (or) C的例子。
OG-15:
Warning that computers in the United States are not secure, the National Academy of Sciences has urged the nation to revamp computer security procedures, institute new emergency response teams, and create a special nongovernment organization to take charge of computer security planning.

OG-17
The commission has directed advertisers to restrict the use of the word “natural” to foods that do not contain color or flavor additives, chemical preservatives, or anything that has been synthesized.
-- by 会员 mongmong (2012/5/23 15:27:03)




嗯~这里加逗号是有它们各自特别的原因的。
第一个句子:通常A,B,C三者并列,如果三者有一者以上过长,或者包括了verb,GMAT偏向于在and前加逗号。
第二个句子or anything前加逗号是为了更加清晰,防止人们读的时候以为是和"color or flavor"一样的结构。

==

mongmong再思考下,其实我说的所有东东,都是从这句话里推导出来的:句式简洁,结构清晰,语义单一而精准
注意“结构清晰”
8#
发表于 2012-5-24 06:32:28 | 只看该作者
请问下面OG-6题中 salt
from the stone was crystallizing and fungus was growing on the walls 中间and之前没什么没有逗号呢?

moisture exhaled by tourists had raised
the humidity within them to such levels that salt
from the stone was crystallizing and fungus
was growing on the walls.

-- by 会员 mongmong (2012/5/23 16:37:10)



在同一个分句里面如果加了逗号,会让人觉得and后面的部分不是在那个分句里的。GMAT里这是 “用and连接两个并列句子时",唯一一个在and前可以不用加逗号 的 情况。
同样地,这也是为了结构清晰
9#
发表于 2012-5-24 06:36:24 | 只看该作者
还有OG-11和24,为何这里的and和or之前加了逗号呢?不是只有A和B,应该不需要加逗号。
11.the most extensively used method has been to form the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them in the wall in mud mortar.

24. dioxin induces the production of enzymes that are the organism's attempt to metabolize, or render harmless, the chemical irritant.

11里面and前面加了逗号是为了让两个长成分之间的并列更加清晰。and后面加逗号是因为 after some preliminary air drying or sun drying 要作为插入语(非限制性修饰)出现。
24里面or render harmless同样是作为插入语出现,因为render harmless是metabolize的"同义改写"(相当于动词的同位语)。
10#
发表于 2012-5-24 08:51:57 | 只看该作者
还有OG-11和24,为何这里的and和or之前加了逗号呢?不是只有A和B,应该不需要加逗号。
11.the most extensively used method has been to form the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them in the wall in mud mortar.

24. dioxin induces the production of enzymes that are the organism's attempt to metabolize, or render harmless, the chemical irritant.

11里面and前面加了逗号是为了让两个长成分之间的并列更加清晰。and后面加逗号是因为 after some preliminary air drying or sun drying 要作为插入语(非限制性修饰)出现。
24里面or render harmless同样是作为插入语出现,因为render harmless是metabolize的"同义改写"(相当于动词的同位语)。
-- by 会员 aeoluseros (2012/5/24 6:36:24)

谢谢Aeo~~
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