几道BY语法题困惑ing，请教各位高手！

whitezt

第七章36题.  In the 1980's the rate of increase of the minority population of the United States was nearly twice as fast as the 1970's.
(A) twice as fast as   (B) twice as fast as it was in   (C) twice what it was in
(D) two times faster than that of    (E) two times greater than

给的答案是C，但是我选B。解释说“it was in the 1970's 是个句子，与名词短语 the rate of increase 形式不对称”。我认为B选项中的it指代the rate of increase，这样正是为了形式对称啊。不解。。。


37题.  Inuits of the Bering Sea were in isolation from contact with Europeans longer than Aleuts or Inuits of the North Pacific and northern Alaska.
(A) in isolation from contact with Europeans longer than
(B) isolated from contact with Europeans longer than
(C) in isolation from contact with Europeans longer than were
(D) isolated from contact with Europeans longer than were
(E) in isolation and without contacts with Europeans longer than

答案给的是D。但是既然谓语相同，为何不能将be动词were省略？


40题.  Last year, land values in most parts of the pinelands rose almost so fast and in some parts even faster than what they did outside the pinelands.
(A) so fast and in some parts even faster than what they did
(B) so fast and in some parts even faster than, those
(C) as fast, and in some parts even faster than, those
(D) as fast as, and in some parts even faster than, those
(E) as fast as, and in some parts even faster than what they did

给的答案是D。但是为何将did省略了？

43题.  Never before had taxpayers confronted so many changes at once as they had in the Tax Reform Act of 1986.
(A) so many changes at once as they had
(B) at once many changes as
(C) at once as many changes that they were with
(D) as many changes at once as they confronted in
(E) so many changes at once that confronted them in

给的答案是D，但是我选A。解释说so...as只能用于否定句中。但是前面不是有个Never吗？D中confronted不应该省略而只用用助动词had吗？

以上3个问题盼高手们解惑！谢谢！

janelby

搬凳凳。。。我也想听。

hughlv

36. 这道题的原句是 ... twice as fast as in 1970's. 我记得有个说法是如果比较的后面部分与前面主谓相同的话必须省略。但记不清出处了，如果找到了的话再来补一下吧。

37. were省略掉会有理解上的歧义，因为后面部分可以与Inuits of the Bering Sea也可以与Europeans进行比较，加上were后就是明确的主语比较。

40. 这个Prep语法笔记和白勇里面都有解释，可省略did的原因是没有歧义，还记得其中的两个例句：I ate more apple than you did. （不能省略） 和 I ran faster than you.（可省略） 可以看出规律来，如果没有宾语就不会产生歧义，因此经常可以省略动词。

43. 这个关于so ... as的我不清楚。但是整个句子从逻辑上是需要表达一个时间上的先后顺序的，这也是为什么需要用一般过去式。

如果有不准确的地方请nn们指正。

cat19bear

第四个问题

否定句是要又Not 才算吧 光有Never 不算否定句

刚刚听了xdf 的教程 应该是
So... as to ...

hughlv

我所知道的固定搭配也是 so ... as to，或者 so as，而不是so ... as

whitezt

感谢hughlv、cat19bear两位的热情解答！
但是还想继续请教各位一下：
36.  BY语法上说“比较从句的主语与主句主语相同，可以省略”。将本题与40题比较一下，感觉句子结构类似，若本题选C“twice what it was in”，那么40题E选项应该也是正确选项了。

37.  个人认为将“Europeans”和后面的“Aleuts or Inuits of...”比较逻辑上行不通，所以可能不会产生歧义。

40.  非常赞同hughlv“没有宾语就不会产生歧义”的观点。另问题同36题。

43.  赞同。谢谢！

不知各位怎么看？请教了！

mihu

40题选E不就句子断掉了么？

Jovenwu

43题.  Never before had taxpayers confronted so many changes at once as they had in the Tax Reform Act of 1986.
(A) so many changes at once as they had
(B) at once many changes as
(C) at once as many changes that they were with
(D) as many changes at once as they confronted in
(E) so many changes at once that confronted them in

给的答案是D，但是我选A。解释说so...as只能用于否定句中。但是前面不是有个Never吗？D中confronted不应该省略而只用用助动词had吗？

个人觉得，因为Never before had taxpayers confronted。。。是倒装，所以先把它顺过来，于是变成了taxpayers had never confronted..before, 于是我们发现，这个部分用的时态势过去完成时，也就是发生在过去的过去，所以后面半句的时态应该为过去时，所以后面半句的动词为confronted,而没有所谓的组动词had，也就没有所谓的组动词Had省略。不知道有没有表达清楚。