揪的好细啊 我觉得 even though/although/though是表示转折让步 while表示对比，这个对比暗示有同时进行的含义 whereas 和but字面意思就能区别开来 坐等nn来
-- by 会员 Suri在奋斗 (2012/7/27 23:02:19)
嗯嗯~~有些清晰啦！
谢~作者: jeffery2541 时间: 2012-7-27 23:25
OG说：“Even though, although, and while introduce clauses that appear to be logically imcompatible but in fact are not.” Even though, although和while引导的从句看起来和主句在逻辑上是冲突的，但是实际上并不冲突。作者: jeffery2541 时间: 2012-7-28 16:56 作者: DeliciaAn 时间: 2015-10-30 23:07
今天找错题翻到前辈的帖子了。之前我也有很认真看过前辈的心经、境况以及其他。虽然现在在对楼主关于这几个词的用法提出一些看法有些晚了，但是也是用于open discussion供后来人观看。
今天做题看到了这么一题目：GWD上有，现在也是OG13中的题目了：
Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been found all over north America, they are named for the New Mexico site where they were first discovered in 1932.
A. Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been found all over north America, they are named for the New Mexico site where they were first discovered in 1932.
B. Although named for the New Mexico site where first discovered in 1932, Clovis points are spear points of longitudinal grooves chipped onto their faces and have been found all over north America .
C. Named for the New Mexico site where they have been first discovered in 1932, Clovis points, spear points of longitudinal grooves chipped onto the faces, have been found all over north America .
D. Spear points with longitudinal grooves that are chipped onto the faces ,Clovis points , even though named for the New Mexico site where first discovered in 1932, but were found all over north America .
E. While Clovis points are spear points whose faces have longitudinal grooves chipped into them, they have been found all over north America, and named for the New Mexico site where they have been first discovered in 1932
查找到Magoosh上的解释说：
even though
although
while
这三个词后面要有完整的主谓，就是要引导clause.
Magoosh关于这个知识点的网页链接：
http://gmat.magoosh.com/forum/3488-even-though-clovis-points-spear-points-with
In the real world, there are multiple ways that you can use Although at the beginning of a sentence. On published official GMAT problems, they seem to stick to the usage that "Although" is used at the beginning of a dependent clause (ie, a set of words that contains a subject and a verb, but is NOT the main sentence or main subject and verb).
This is not the case with the word Though—there are published OG problems that use Though at the beginning and that do not introduce a full clause. (Caspian Sea—an old / retired OG problem—is one example.)
Below is a list of all problems in the current edition (2022) of the OG that have at least one answer choice beginning with the word Although. In every case in which Although is used in the correct answer, it is used to introduce a subordinate clause (ie, with subject and verb).
#828
#831
#839
#852: Official explanation for part of incorrect answer A: "To make the sentence grammatically coherent, the word sequence Although . . .brick needs to be a complete clause"
#865
#901: Official explanation for incorrect E: "The word although is a subordinating conjunction used only to introduce a subordinate clause, which is required to have its own verb."
#906
#916
#958
#961: Official explanation for incorrect B: "where discovered is missing a subject—the correct form is where they were first discovered." Note: This answer choice is a modifier describing the following subject, one of the usages that Ron says is correct—and he is absolutely correct on this in the real world. In fact, I would argue with the official explanation. I think that the real issue with the Although clause in this choice is that the actual contrast is illogical: Although named for [a certain site], Clovis points are spear points ... is not a contrast.
#974
#979
#993
The explanation for #901, in particular, appears to indicate that the GMAT still holds to the "classic" definition / usage of Although.
I don't believe that the GMAT would give us an incorrect Although choice that was 100% correct except that it used one of the two alternatives that Ron cited (an adjective or a modifier describing the following subject)—because, in the real world, those are perfectly acceptable. There will always be something else wrong. (The same is true for things like Oxford comma use—they'll always use the Oxford comma themselves, but they won't give you something without the Oxford comma that has to be marked wrong only for that reason.)
It also seems to be the case, at least to the point at which the OG2022 was published (a year ago) that they are holding *themselves* to the standard of using Although with a full dependent clause (ie, the classic usage/construction). And the wording of a few of the explanations seems to indicate that the test writers, again at least up until that point, considered this the only valid construction. So I would go with that unless/until they publish something that contradicts the evidence to date.
