关于n.+状语从句的问题，欢迎讨论

og10-205

The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as “standing waves.”

(A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are

(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is

(D) stationary crests and troughs although the air that forms them is moving rapidly, are

(E) stationary crests and troughs although they are formed by rapidly moving air, is

e中：with+n.+ although 状语从句表达有误

og10-251

The gyrfalcon, an Arctic bird of prey, has survived a close brush with extinction; its numbers are now five

times greater than when the use of DDT was sharply restricted in the early 1970’s.

(A) extinction; its numbers are now five times greater than

(B) extinction; its numbers are now five times more than

(C) extinction, their numbers now fivefold what they were

(D) extinction, now with fivefold the numbers they had

(E) extinction, now with numbers five times greater than

e中：now with numbers five times greater than
      the use of DDT was sharply restricted in the early 1970’s.

是不是也属于with+n.+when 状语从句表达有误

prep1-31

 (A) so that it was the lowest in two years

 (A) so that it was the lowest in two years

 (A) so that it was the lowest in two years

(B) so that it was the lowest two-year rate

(C) to what would be the lowest in two years

(D) to a two-year low level

(E) to the lowest level in two years

A\B中：the July decrease（n.）+so that状语从句 错误！！

但是

n.+after/since等可以吗？

5 centuries +after从句可以的呀！

那什么情况下，n.+状语从句可以，什么情况不可以呢？

今天又发现一道类似题

prep1-64

Recently documented examples of neurogenesis（神经形成）, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

 A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that

 A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that

B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they

C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they

D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they （when 状语从句不能修饰名词）

E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that

MM的例子很好，多谢！

觉得你的问题不好回答，是不是把握了一个原则 -- 状语从句/副词修饰动词/形容词 -- 就可以解释相关的现象呢？如果一个结构中仅仅有名词/代词等不可以被副词性的结构，你放个状语从句就错了，你那205题DE就是这个情况，PREP1-31那题需要一个结构修饰unemployment，结果给了个副词词性的东西在它后面，当然不行了。

通过几天复习，发现我们往往要先弄清楚原句中各个对象之间的逻辑关系，然后才能考虑各个结构的语法功能，最后才能决定哪个是最佳选项