求教OG 13 SC 65，不是Ving的问题。而是than的问题。谢谢！

HyeHye

xueluanfei 发表于 2013-1-19 11:15
先试着回答你第一个问题：个人感觉在这里的情况是比较结构的状语比较，是时间状语的相互比较，在状语比 ...

我先把OG13-42原题完整贴出来
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.
(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economic
分析：
(B)(C)economical 节约的 词用错了
(A)... demographers have to know a great deal more than now about ... ；(E)... demographers would have to know a great deal more than now about ... 因为省略的they do，也就变为 a great deal与now比较(即省略了主谓，而成为状语间的比较)。
选项(D), 应该是整个句意之间demographers would have to know a great deal与they do now about ...；也可理解为：因为demographers和they的谓语时态的不同，所以前后都需要补出谓语动词，而因为谓语动词的补出，主语也必须要补出。
希望进一步讨论

derekd0331

Hendy

yiqing2012 发表于 2013-1-19 12:33
看了这个解释还是觉得不大明白。。继续求教。。。1.原题正确选项带入是：Digging in sediments in north ...

对，前人关于这种状语比较已经总结的狠清晰了

Hendy

HyeHye 发表于 2013-5-20 06:44
我先把OG13-42原题完整贴出来
To develop more accurate population forecasts, demographers have to kn ...

关键要理解作者写这句话的愿意，是比较什么，跳出语法看语义

XeldonXXXX

可能是than thought 和as soon as possible、than usual、than ever等一样属于习惯用法吧

jessicamss

考古到了这一题，找到了国外网站上牛人老师的解释，贴一下：

First of all, look at the split "evidence that" vs. "evidence which" ---- which of these two is correct? See these two posts:
http://magoosh.com/gmat/2012/that-vs-which-on-the-gmat/
http://magoosh.com/gmat/2012/gmat-gramm ... modifiers/
The fact that there is no comma following the word "evidence" means that the modifier following it is a vital noun modifier, a.k.a. a restrictive modifier. The GMAT always uses "that" for restrictive/vital modifiers, and always uses "which" for non-restrictive/non-vital modifiers. Thus, the "which" is wrong here: that's one problem with (E).

Here's the larger issue. Think about it this way. Let's state the sentence without dropping any of the repeated words in parallel. Let's pretend we can't omit anything and have to state everything explicitly. Then, we would have:

Digging in sediments in northern China, scientists have gathered evidence suggesting that complex life-forms emerged much earlier than when complex life-forms were previously thought to emerge.

Clearly, that's very awkward and much too long. We are allowed to drop everything among those orange words that are a repeat or are obvious form context. The only piece that is truly different from the part before the word "than" is "previously thought", so that's all we need.

(C) ..... than previously thought. Clear, concise, unambiguous, and grammatically correct.
(D) ..... than that which was previously thought --- very wordy, and it's unclear to what the word "that" refers
(E) ..... than that previously thought -- it's unclear to what the word "that" refers.
Think about "that previously thought" --- to what does the "that" refer? What exactly is "previously thought"? What did the scientist think at an earlier time? This really refers to the verb, to the action of the verb "emerged" --- previously, scientists thought that these critters emerged later, and now the evidence suggest that they emerged earlier. The entire comparison revolves around the verb --- when did they emerge. We cannot use the pronoun "that" to refer to the action of a verb. If we want to use "that" correctly, we would have to change around the whole sentence -----

..... gathered evidence suggesting that complex life-forms had an emergence that was much earlier than that previously thought.

Now, that version is an abominable trainwreck. Even in this version, that word "that" is entirely optional --- the phrase "than previously thought" is still 100% correct by itself, but at least in this sentence, the "that" isn't absolutely wrong when it's included, because there's a clear noun antecedent. In choices (D) & (E), the word "that" is 100% wrong, because it is trying to refer to the action of a verb, which is not allowed.

This is why (C) is not only the best answer but the only possible answer.

yklyykly

jessicamss 发表于 2015-9-27 14:36
考古到了这一题，找到了国外网站上牛人老师的解释，贴一下：

First of all, look at the split "evidence  ...

谢谢！！！！收益

大大刀

XeldonXXXX 发表于 2015-4-29 12:57
可能是than thought 和as soon as possible、than usual、than ever等一样属于习惯用法吧

   

大大刀

jessicamss 发表于 2015-9-27 14:36
考古到了这一题，找到了国外网站上牛人老师的解释，贴一下：

First of all, look at the split "evidence  ...

同意！