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标题: OG SC No. 126 [打印本页]

作者: 薰衣紫草    时间: 2005-3-8 01:47
标题: OG SC No. 126
126. More than thirty years ago Dr. Barbara McClintock, the Nobel Prize winner, reported that genes can “jump,” as pearls moving mysteriously from one necklace to another.



(A) as pearls moving mysteriously from one necklace to another



(B) like pearls moving mysteriously from one necklace to another



(C) as pearls do that move mysteriously from one necklace to others



(D) like pearls do that move mysteriously from one necklace to othersB



(E) as do pearls that move mysteriously from one necklace to some other one


After reviewing all the discussion links I can find, I still have some doubt regarding the explanation, from OG, why C, D, and E are faulty. OG explains that because the verb do suggests that the migrating pearls are presented as a real phenomenon, not as a figurative illustration.


But as stated in this summary, "补出助动词的原则是必须和主句的类型一致,而且要时态一致。


一个语法考点的总结!(Like和As)http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=48608


My point is that in the clause genes can “jump”, the verb is "can", not "do". Therefore, the verb "do" makes C, D, and E all wrong. It should be as peals can ......


NN, what do you think?


作者: mitr_sg    时间: 2005-3-8 04:00

well, personally, I think as you quoted " presented as a real phenomenon, not as a figurative illustration."  "can" might leave problem unresolved.  修饰好象大多都是用...ing, D 读起来有些别扭.


作者: 薰衣紫草    时间: 2005-3-9 07:29

D 肯定是错的。 因为 like 不能跟 clause

但问题是如果把 E 改成 as can pearls .... 是否就对了呢?


作者: colacat    时间: 2005-3-9 10:02

不对

首先 GMAT里,like 表比喻,意为象....一样。形式是like + n

in choice B like pearls moving mysteriously from one necklace to another

moving mysteriously from one necklace to another 做定语修饰的是pearls.

意为象.......一样的珍珠。从整句来说,就是把 Dr. BM的这个发现,比喻成珍珠。


作者: 薰衣紫草    时间: 2005-3-11 08:17

我承认 B 是对的

但 as 也可以作为比喻的一种方式,后面跟 clause

按照ETS的解释:because the verb do suggests that the migrating pearls are presented as a real phenomenon, not as a figurative illustration.

但问题是如果把 E 改成 as can pearls .... 是否就对了呢?


作者: colacat    时间: 2005-3-11 08:53
去掉that就没问题吧
作者: uajasmine    时间: 2005-3-11 10:42

As far as I am concerned, OG does not use the figurative function of "as", "as" is only used as a conjunction.

Further, even if you change "do" to "can", I do not think it is right, becuase pearls CAN NOT move mysteriously from one necklace to some other one.

Well, I don's think I am clear, sigh! Sorry for that!


作者: xealot    时间: 2005-3-11 10:54
偶以为:

1. 补出助动词的原则是必须和主句的类型一致,而且要时态一致。

偶认为这种说法不准确。时态是否一致应当取决于切实情况:
He is doing a fantastic work as did Gen. Robert E. Lee in the Civil War.
He did a fantatic work as did Gen. Robert E. Lee in the Civil War.
上面两种情况代表了的意思,但偶认为都没有错。

2. OG的意思是,pearl实际上没有这样运动,因此表示实意的do不合适

3.
但问题是如果把 E 改成 as can pearls .... 是否就对了呢?


也不对,pearls当然不can的...这可能是楼主MM理解的误区...

作者: ford424    时间: 2005-3-11 13:27

省略规则:

在比较结构中,但谓语(内容)一致的时候,比较两个主语时,在比较词(than/as)后,要尽量补出谓语动词,其原则为:

1)当比较词之前的谓语动词为一般现在时或一般过去时,比较词后应该相应的用do/does/did/is/was/were/are来替代(主语对比, 有时候动词可以省略 eg. He gains more weight than Tom.)

2)当比较词之前的谓语动词由助动词(情态动词)+主要动词组成,则在比较词之后保留此助动词(情态动词)即可;

3)比较前后的时态不一致:两个比较对象的动作是相同的,但是其发生的时间却不一致

a.比较前是过去时,其后的时间状语暗示了将来的动作,补出助动词will

b.比较前是过去时,其后是过去完成时,补出had

c.比较前面是过去完成时,其后是过去时,谢全动词.


作者: xealot    时间: 2005-3-11 13:43

在比较结构中,但谓语(内容)一致的时候,比较两个主语时,在比较词(than/as)后,要尽量补出谓语动词,其原则为:

1)当比较词之前的谓语动词为一般现在时或一般过去时,比较词后应该相应的用do/does/did/is/was/were/are来替代(主语对比, 有时候动词可以省略 eg. He gains more weight than Tom.)

2)当比较词之前的谓语动词由助动词(情态动词)+主要动词组成,则在比较词之后保留此助动词(情态动词)即可;

3)比较前后的时态不一致:两个比较对象的动作是相同的,但是其发生的时间却不一致

a.比较前是过去时,其后的时间状语暗示了将来的动作,补出助动词will

b.比较前是过去时,其后是过去完成时,补出had

c.比较前面是过去完成时,其后是过去时,谢全动词.



So complex...
偶觉得比较时是否省略谓语动词(或其合理的助动词)主要靠意思判断,比如上面那个例子:

He gains more weight than Tom.

偶认为,在这里,Tom前面或者后面需要一个does,否则有两种理解,其中一种是:

He gains more weight than he gains Tom.

偶觉得而是否产生歧义的一个重要(而不是绝对/唯一)的表征是有几个可以用于比较的名词性结构:

He did better than Tom.

在这样一个例子里面,不存在任何曲解,因此省略Tom前/后的did就不成问题了。

作者: ford424    时间: 2005-3-11 14:38

版主说的是,tom的例子举的不好,不过下面的都是在og里面验证的,因该没有问题.


作者: xealot    时间: 2005-3-11 15:15
偶没记错的话,OG至少有两道题的划线部分明显的省略了助动词....其中至少一道题的解释里面提及了这样省略的合理性...
作者: 薰衣紫草    时间: 2005-3-13 11:14

请恕我打破的砂锅还不够多,只好接着砸。

我认为ETS否定的理由是do用在这里不妥当,因为do表示一个真实现象,而非一个比喻。

但在我看来do这个verb本来就补的不正确。因为原句中的情态动词"can"才是真正要补出的谓语动词。  

xealot斑竹认为:“pearls当然不can的...这可能是楼主MM理解的误区...“  我觉得在这里虽然珍珠不can,但作为一个比喻是一定要这么说的,如同正确答案  like pearls moving mysteriously from one necklace to another 也包含了这个意思---就是珍珠move



作者: ford424    时间: 2005-3-13 14:17

版主可否帖出来, 找了好久没有发现.

感谢!


作者: colacat    时间: 2005-3-13 14:31
以下是引用薰衣紫草在2005-3-13 11:14:00的发言:

请恕我打破的砂锅还不够多,只好接着砸。


我认为ETS否定的理由是do用在这里不妥当,因为do表示一个真实现象,而非一个比喻。


但在我看来do这个verb本来就补的不正确。因为原句中的情态动词"can"才是真正要补出的谓语动词。  


xealot斑竹认为:“pearls当然不can的...这可能是楼主MM理解的误区...“  我觉得在这里虽然珍珠不can,但作为一个比喻是一定要这么说的,如同正确答案  like pearls moving mysteriously from one necklace to another 也包含了这个意思---就是珍珠move



agree


作者: 薰衣紫草    时间: 2005-3-15 09:42
up
作者: diehard    时间: 2005-7-13 09:09

genes 能够跳,就象pearls 能跳一样


genes 能够跳,就象pearls 跳一样


意思好象有点差别


我更同意第二句


所以还是用do好一些




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