which 引导非限制性定语从句时，只能指代前面的名词，而不能指代整个句子吗？这是GMAT的一条语法规则吗？在OG上有提到吗？
我是看了Prep1破解版的语法第58题题目：
Both weakened by concern about the government's agreement with the International Monetary Fund and by growing fears of a rise in inflation, the country's currency continued its slide to a record low against the dollar, which forced the central bank to intervene for the fourth time in a week.
A选项（即原题划线句）Both weakened by concern about the government's agreement with the International Monetary Fund and by growing fears of a rise in inflation, the country's currency continued its slide to a record low against the dollar, which forced
另外，A显然是有点问题的。不是在which上。你看前半句啊，Both weakened by concern....and by growing...你觉得and前后平衡吗？至少要both weakened by....and done by....才对，或weakened both by... and by...。第二，第一个by后面是名词，后一个by后面是doing，也不平衡。所以A是显然不好的。问题是不是出在which上不好说，但是A肯定就按我这点就被排除掉了。你说对吗？作者: jingjane 时间: 2013-4-25 08:09
此外，我觉得你说的另一个错误原因的一部分部分是对的，我也知道应该是Weakened both by concern about、、、and by growing fear of、、、,构成both and 的平行结构。但是growing这里相当于形容词，是修饰后面的名词fears的，所以如果改成我写的那样，就是对的平行结构。
诶，是这样的。我要强调的是GMAT不是考语法，而是考逻辑。商学院是英语系，gmat考语法的目的是要你找出一种让别人更容易接受的表达。而且，我很建议你不要去总结gmat里面的语法，否则要中招的。prep里没有用which指代句子的，不代表不能出。只要老美用过的，就是对的。但未必是最好的。which指代句子为什么gmat里少（不是没有），是因为其不精确。像刚刚的题目，你需要让接受者想你的which是哪个理由引起的，这个force的动作到底是谁发起谁导致的，是both里面的内容还是，下滑引起的？那么就不太精确。但是，前提是，如果没有其他更加严重的语言问题时，which不够好，并不是有了which指代句子就一定错。明白吗？所以，一定要看5个选项，在选项里找暗示和做题思路。不要研究每个选项为什么对为什么错，因为正确的未必没有语法错误，错误的未必语法就不对。看似公正，但只要给听者带来理解歧义，就不是一个好的管理者，也不该有好的gmat成绩。
这题我到网上找到了原题，我谈谈我的做题思路吧，仅供参考：
Both weakened by concern about the government's agreement with the International Monetary Fund and by growing fears of a rise in inflation, the country's currency continued its slide to a record low against the dollar, which forced the central bank to intervene for the fourth time in a week.
(A) Both weakened by concern about the government's agreement with the International Monetary Fund and by growing fears of a rise in inflation, the country's currency continued its slide to a record low against the dollar, which forced
(B) Both concern about the government's agreement with the International Monetary Fund and the growing fears of a rise in inflation weakened the country's currency, continuing its slide to a record low against the dollar, which forced
(C) Both because it was weakened by concern about the government's agreement with the International Monetary Fund and by growing fears of a raise in inflation, the country's currency continued its slide to a record low against the dollar, forcing
(D) The country's currency, weakened both by concern about the government's agreement with the International Monetary Fund and by growing fears of a rise in inflation, continued its slide to a record low against the dollar, forcing
(E) The country's currency, weakened by both concern about the government's agreement with the International Monetary Fund and growing fears of a raise in inflation, continued its slide to a record low against the dollar, which forced
A的问题很显然both pp by noun... and by,肯定错,去掉
B。and后面多了一个the，and前没有the表示非限定，泛指，而后面多了the，表达的范围就不同了。所以一定不符合逻辑。
C。和A理由差不多
D。both and里面的结构是一致的，且句子意思也一直都是by两个东西，表达两个原因。对方很容易理解。先放着
E。both里面也可以。
D好的原因是，你看d的句子
The country's currency, weakened both by A and by B, continued..., forcing....
weakened是一个pp引导一个状语，它的发起者很清晰，只能是the country's currency。第二个动作，continued是个本句谓语，动作发起者即主语也很清晰，只能是the country's currency。forcing是个现在分词的状语，他的主语还只能是The country's currency，不可能是其他句子或状语吧，对吧。那么这句话三个动作的发起者都很清晰。
好了，看E
which forcing，你自己说，which的指代明确吗？which既可以指The country's currency也可以指几个插入状语，甚至可以指countiuned发起的主句。指代不明确。需要对方自己去想。所以D和E是D好。
但是注意了，如果没有D，就ABCE比较式E好。OK？
仅供参考，欢迎交流。作者: Knightll 时间: 2013-5-2 19:02
which 是不能指代整个句子，manhattan SC里面有。
原话是“Use WHICH only to refer to the noun immediately preceding it——never to refer to an entire clause.”作者: chaos1026 时间: 2013-5-3 07:55
