再问:------------>>>OG12 014， although?

kingarthur00

014
Sunspots, vortices of gas associated with strong electromagnetic activity, are visible as dark spots on the surface of the Sun but have never been sighted on the Sun’s poles or equator.
(A) are visible as dark spots on the surface of the Sun but have never been sighted on
(B) are visible as dark spots that never have been sighted on the surface of the Sun
(C) appear on the surface of the Sun as dark spots although never sighted at
(D) appear as dark spots on the surface of the Sun, although never having been sighted at
(E) appear as dark spots on the Sun’s surface, which have never been sighted on
OG C explanation：although typically introduces a subordinate clasue, which has a subject and a verb, but here there is no subject and sightedis not a completd verb。


反例：OG12-035.

Along with the drop in producer prices announced yesterday, the strong retail sales figures released today seem like it is indicative that the economy, although growing slowly, is not nearing a recession.

此时省略了：economy is--à although（economy is） growing slowly



Q：该如何理解这个矛盾？（偶晓得014中，A比C好。偶只想知道OG12-014-C为什么那么解释？---自我矛盾丫丫丫丫）
盼NN启迪!

小甜菜的宝宝

“1、although一般应该+主谓结构，并且和主句用，号隔开；
2、状语从句的省略结构
   although + adj短语/-ing分词短语/-ed分词短语，这种情况下逻辑主语是主句主语；”

摘抄自http://forum.chasedream.com/GMAT_SC/thread-379675-1-1.html，也是根据这个题目讨论although用法，很多大牛现身的，楼主可以参考一下。

kingarthur00

非常感谢Gail小M的再次相助！

根据上述2题，关于although的状语从句省略，GMAC的思维是这样的：在符合语法规则的前提下，although在紧跟主句主语后面时候，此时可以省略！远离主句主语时最好不用该语法规则！

具体如何解释上述2题矛盾之处，还盼更多NN解答！！！

Gail小M

兄弟 你好细致啊...
14 C 的表达：appear on the surface of the sun..although never sighted at... OG表示说这里although是引导从句

Sunspots, (vortices of gas associated with strong electromagnetic activity,) appear on the surface of the Sun as dark spots although never sighted at the Sun’s poles or equator.
暂时忽略although
换个语序： sunspots (never sighted at the Sun's poles or equator )appear on the surface of the sun as dark spots.
这样看,它就是个过去分词做定语.... 但是C选项把它凹得像个从句一样

真做定语 忽略别的问题：Sunspots, although never sighted at the sun's poles, appear on the surface of the sun as dark spots.. 这样就清楚了..

35..although growing slowly就很清楚..modify“economy”