og sc23 关于although 和even though 的用法问题

moonemma

23. The Iroquois were primarily planters, but supplementing
their cultivation of maize, squash, and beans with
fishing and hunting.
(A) but supplementing
(B) and had supplemented
(C) and even though they supplemented
(D) although they supplemented
(E) but with supplementing

1.解释说C选项中 and even though creates a sentence fragment.我不是很懂为什么。

2.我有看到之前相关的问题（http://forum.chasedream.com/foru ... highlight=og%2Bsc23），回复说道：“even though can only + clause！！！
although can take clause/ving/ved/adjective(后三者是作为状语从句的省略形式，具体关于状语从句的省略prep08语法笔记有讲解，你可以用word文档的搜索看下”
就这句话而言，og sc17  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
(0 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

中C选项解释道：Although typically introduces a subordinate clause, which has a subjectand a verb
但是，按照帖子的回复上说的，那么C,D选项的although 用法就是正确的，这与og 就相反了

3.请NN总结一下although 和even though 的用法

谢谢！

xiuyiwei1

我记得magoosh的里面有讲到although等的用法，although后面必须加完成的句子。
至于C中fragment的原因应该是and，原文中并没有并列的的意思，而是给出了主句，后面逻辑来说应该是让步，
他们吃blabla，虽然blabla。
如果加了and并列确实就分割了。其实单从意思来看就能选D。

ukyo2003

我的理解

23. The Iroquois were primarily planters, but supplementing their cultivation of maize, squash, and beans with
fishing and hunting.
(A) but supplementing (but前面有逗号，表示单独承接一个句子结构，后面没有主语，现在进行时没有依据)
(B) and had supplemented (and前面有逗号，表示单独承接一个句子结构，后面没有主句，过去完成时没有依据)
(C) and even though they supplemented (and多余)
(D) although they supplemented (正确)
(E) but with supplementing (with supplementing错误)

og sc17  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 (正确)
(B) are visible as dark spots that never have been sighted on the surface of the Sun (原句是Sunspots are visible as, Sunspots never been signed，这里that modifier改变了意思)
(C) appear on the surface of the Sun as dark spots although never sighted at (although 前后时态不一致)
(D) appear as dark spots on the surface of the Sun, although never having been sighted at (never having been永远错)
(E) appear as dark spots on the Sun's surface, which have never been sighted on (which错误修饰Sun's surface)

moonemma

我再研究一下，谢谢！

jessie_27

23. The Iroquois were primarily planters, but supplementing
their cultivation of maize, squash, and beans with
fishing and hunting.
(A) but supplementing
(B) and had supplemented
(C) and even though they supplemented
(D) although they supplemented
(E) but with supplementing
1.解释说C选项中 and even though creates a sentence fragment.   C选项中到底是什么造成了 a sentence fragment? 是因为and 吗？ 如果删掉and 不看的话 even though they supplemented 还会造成a sentence fragment吗？？
求问，谢谢大家。。。。

DeliciaAn

Magoosh里面也说although, even though, while后面要加SV的。详情见：
http://gmat.magoosh.com/forum/3488-even-though-clovis-points-spear-points-with