以下是引用2000000006在2005-11-30 16:23:00的发言： For Example, [a sentence from Bai Yong's Grammar book] As the etched lines on computer memory chips have become thinner and the chips' circuits (have become)more complex, the power of both the chips and the electronic devices they drive has vastly increased. (this part in the bracket can be omitted)
请注意上面例句中省略的是相同成分have become而18提中如果省略了could be的话,could be cleaner,be是系动词,第二个第三个变成被动语态标志词be,功能不同,不能省略.而且and后面its crime rate reduced 该句中没有被reduced这个动作的发出者,缺少by某个agent,这种被动语态在gmat中是多次证明错误的.
c正确是因为变成三个句子并列the city’s streets could be cleaner, its fire code could be better enforced, and it could reduce its crime rate
我们要选择的是实质上的并列,而不是形式上的并列,从逻辑意思出发
-- by 会员 titatita (2006/6/6 19:57:00)
关于B的争议都集中在攻击第二个和第三个是被动语态be enforced, be reduced 里的be, 和前面的 be cleaner 的系动词作用不一样。 我觉得不要看到enforce 和 reduce都是动词就一定判断这里是被动语态，动词的-ed分词形式也可以起形容词作用。 Longman: enforced: adj: made to happen, especially by things you cannot control e.g. enforced absence/separation; a period of enforced isolation dictionary.com: reduced: adj. that is or has been reduced. e.g reduced noise, reduced paycheck 把B补完整之后就是：the city’s streets could becleaner, its fire code (could be) better enforced, and its crime rate (could be) reduced。我觉得把这里的enforced 和reduced理解成形容词没什么不可。
相比C的两大硬伤：1) it 指代到所有格中去 2)就算it 指代city,原意中并没有说是city发出reduce crime rate这个动作，只是说有这些service之后crime rate会有所降低，但不一定就是由city 来 reduce的。
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发表于 2009-6-11 16:11:00
