贴一道楼主考察的：来自prep…
Whereas the honeybee’s stinger is heavily barbed and cannot be retracted from the skin, because the yellow jacket has a comparatively smooth stinger, it is therefore able to be pulled out and used again.
A. because the yellow jacket has a comparatively smooth stinger, it is therefore able to be pulled out and used
B. the comparative smoothness of the yellow jacket’s stinger allows them to pull it out and then can therefore use it
C. the yellow jacket’s stinger is comparatively smooth, and can therefore be pulled out and used
D. in comparison, the yellow jacket’s stinger is smooth, and thus able to be pulled out and used
E. in comparison, the yellow jacket has a smooth stinger, thus allowing it to be pulled out and used
题目释义：Whereas the HBS is barbed and cannot be retracted…, YJS is smooth and can…
考点：
1. 句子完整结构 (结合前面提到的run-on)
1) S+V1+O1, and V2+O2.是很常见的结构. and之后的主语是S, 可是被省了.
2) S+V1+O1, and pronoun(指代S)+V2+O2. 也是很常见的结构.
一般在and之后用pronoun指代S作主语是因为and跟S的距离太远.
3) S+V1+O1 and pronoun(指代S)+V2+O2. 被OG10列为run-on sentence
2. can和be able to的区别:
You can say that somebody is able to do something, but can is more usual.
Bau can has only two forms: can and could. So sometimes it is necessary to use be able to.
For instance: I will be able to get the car in a week.
就是说不需要从意思上（能力还是可能性）加以区分，只要注意时态和对称的角度看哪个更合适就行。
**: can和be able to在与主语搭配逻辑上没有问题的情况下(如主语都是”人”，而不是物)，可以平行。
选项分析：
A． 因为有了whereas表示对比，because多余； 因为前面未划线部分用的是cannot，后面用can更加呼应，同理后面用it is也是累赘的。
B． the comparative smoothness of结构复杂，且与前面不对称；them指代不明
C． correct；从形合上直接判断C也是最好的：whereas honeybee’s stinger is barbed, yellow jacket’s stinger is smooth；cannot be retracted与can be pulled out。注意！形合意合的方法是迅速解决难题的一大技巧。另外还有一处意合点：comparatively与前面heavily的对称，可以直接排除B,C,D。
D． In comparison 和 whereas 语义重复；因为前面未划线部分用的是cannot，后面用can更加呼应。
E． In comparison 和 whereas 语义重复；划线部分与前面未划线部分不对称，ineffective。作者: myice 时间: 2010-12-6 11:48
17. a large group of person and person的单复数；
18. NOT ONLY BUT ALSO 1题， NOT ONLY BUT 1题，有一题平衡真的很阴湿- -选项有3组不同的平衡结构，还都平衡- -。 最后我是选了用动词平衡的那组，做这种题要多注意语意~~ 有一题答案是选SINCERE TO。我不知道对不。反正其他看着都碍眼。 预发JJ不给力。各位见谅。。作者: myice 时间: 2010-12-6 11:49
给大家贴几道not only..but (also)考点的题
197. (GWD-8-Q20) Not only did the systematic clearing of forests in the United States create farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also caused erosion and very quickly deforested whole regions.
A. Not only did the systematic clearing of forests in the United States create farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also
B. Not only did the systematic clearing of forests in the United States create farmland (especially in the Northeast), which gave consumers relatively inexpensive houses and furniture, but also
C. The systematic clearing of forests in the United States, creating farmland (especially in the Northeast) and giving consumers relatively inexpensive houses and furniture, but also
D. The systematic clearing of forests in the United States created farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also
E. The systematic clearing of forests in the United States not only created farmland (especially in the Northeast), giving consumers relatively inexpensive houses and furniture, but it
题目释义：The systematic clearing of forests did sth.…,but it also…
考点：
1. 平行，关于not only…but also，参见后面所摘录的Zeldaw里程碑式的帖子:
2. 逻辑为王：
如果你一眼看出这个句子考not only，but also于是开始找答案，恭喜你，又上当了。
做题的时候要弄清楚句子的意思是递进还是转折,如果是递进not only...but also 没问题,如果是转折的话,就要考虑一下是否是GMAC的陷阱了, but/but also才是表示转折的意思.
选项分析：
A. not only 位于句首时，所引导的句子要用倒装，give和create是and连接的两个并列成分，而时态已经被did提前，只能用原形。所以这里gave错。But it also没有错。例见大全354.
B. Which定语从句修饰farmland，逻辑意义错误，是systematic clearing给了consumers houses and furniture，不是farmland。
C. But also之前无谓语，片段。
D. Correct；But it also,转折前后句，说明systematic clearing既带来了好东西，也带了坏东西，also的使用，精妙。
E. Giving修饰created,改变了原来的句意：并列的两个动作；Not only…but…也可以，例见大全189、241.作者: myice 时间: 2010-12-6 11:50
补充：
Zeldaw的帖子摘录如下：
关于not only...but also...----从GWD8-20总结出的
看了GWD8-20, 以前的NN讨论的的太好了,可是藏的太深,很多人都看不见, 后来又看了好些的帖子,,收益良多.所以我把大家观点总结一下,
首先Not only…..but (also)表示的关系是递进, 其中also可以省略
But/but also表示的是转折. 在but also中, ring_cheng认为also不属于重复, 所以应当保留.该观点尚未证实.
not only ...but also表示并列，不能表示转折，不要有先入为主的感觉认为not only...but also必须一起出现。单独出现but also是可能的，参见大全74
All-terrain vehicles have allowed vacationers to reach many previously inaccessible areas, but they have also been blamed for causing hundreds of deaths, injury to thousands, and seriously damaging the nation’s recreational areas.
(A) deaths, injury to thousands, and seriously damaging
(B) deaths and injuring thousands, and serious damage to
(C) deaths, thousands who are injured, as well as seriously damaging
(D) deaths and thousands of injuries, as well as doing serious damage to （D）
(E) deaths, thousands are injured, and they do serious damage to
关于not only…but also.. 的用法,我根据前人的发言并结合GMAT的思路挑出了这几条:作者: myice 时间: 2010-12-6 11:50
1.在正常语序中: not only … but also 应连接两个相对称的并列成分。例如：
Not only Mr Lin but also his son joined the Party two years ago. （连接两个主语）
I not only play tennis but also practise shooting. （连接两个谓语动词）
He plays not only the piano but also the violin. （连接两个宾语）
在正常语序中: 短语本身不可以加入其它成份，比如变成：not only...but it also...是错误的（因为破坏了平衡）。
如大全中：
125.The winds that howl across the Great Plains not only blow away valuable topsoil, thereby reducing the potential crop yield of a tract of land, and also damage or destroy young plants.
(A) and also damage or destroy
(B) as well as damaging or destroying
(C) but they also cause damage or destroy
(D) but also damage or destroy（D）
(E) but also causing damage or destroying
Choice D, the best answer, correctly employs the correlative construction not only x but also y, where x and y are grammatically parallel and where both x and y (damage and destroy) apply to young plants. Choices A, (not only... and also), B (not only... as well as), and C (not only... but they also) violate the not only... but also paradigm. Moreover, B contains terms (blow... damaging) that are not parallel. In C and E, damage is used not as a verb with young plants as its direct object but as a noun receiving the action of cause; consequently, these choices fail to state explicitly that the damage is done to young plants. E also violates parallelism (not only blow... but also causing)作者: myice 时间: 2010-12-6 11:50
2. not only … but also 连接两个主语时，谓语动词要和与其最近的主语保持人称和数的一致。例如：
Not only the students but also the teacher was against the plan. / Not only the teacher but also the students were against the plan.
3. not only … but also 不能用在否定句中。例如：
误： They don't fear not only hardship but also death.
正： They fear neither hardship nor death.
正： They don't fear either hardship or death.作者: myice 时间: 2010-12-6 11:50
4. not only … but also 连接两个分句，并且 not only 位于句首时，第一个分句中的主语和谓语要部分倒装。例如：
Not only does the sun give us light, but also it gives us heat.
Not only did he speak English correctly, but he also speaks it fluently.
《新编英语语法》薄冰P633：Not only does he compose music, but he also play./ Not only does he have to type out the answer on a computer, but he also gets the computer to translate it into sounds.
《新编英语语法》章振邦1005：She was not only compelled to stay at home, but she was also forbidden to see her friends
英语语法大全上的例句是: Not only did they break into his office and steal his books, but they also tore up his manuscripts. 所以我个人认为在倒装的情况下,but also是可以被主语拆开的.
这里附上ring_cheng的观点:倒装时可以在短语中插入某类成分，如：not only did sb do sth, but sb also did sth （之所以前后都加入主语，不是为了连接主语，而是为了句子的对仗工整而补足主语，连接的其实是主语的两个不同的谓语动作。又因为not only在句首已经倒装过了，所以but also用正常语序即可。依然满足句子平衡的要求）.如大全:
354.In 1978 a national study found that not only had many contractors licensed by a self-policing private guild failed to pass qualifying exams, they in addition falsified their references.
A. they in addition falsified their references
B. they had their references falsified in addition
C. but they had also falsified their references
D. they had also falsified their references（C）
E. but their references were falsified as well作者: myice 时间: 2010-12-6 11:50
再来几道正确句子prep：
205. (T-9-Q15) The commission’s office of compliance, inspections, and investigations plans to intensify its scrutiny of stock analysts to investigate not only whether research is an independent function at brokerage firms, but also whether conflicts result when analysts own the stocks they write about or when they are paid for their work by a firm’s investment banking division.
19. 印象很深有个题考了 emphasis on ，注意划线的开头已经有了on, 后来有两个选项又重复了on，是错了。我开始没注意到选不出来。
20. 考了as well as。和and。 大家看看og上怎么排除as well as的吧作者: myice 时间: 2010-12-10 13:36
21. 有考 upward to...downward to...fxxxly to.属于并列吧
22. a large number of xxxs 主谓一致问题
23. 有一道倒装， 未划线部分是only in korea...... 我选了 do women have less
平行结构：embraced...., gathered....., and then erected...... 这道比较阴险， 想起一道，考了“夹心饼干”结构
25. 語法NOT ONLY..BUT...沒ALSO
BECAUSE THE MORE...THE MORE
主詞動詞單複數
JUST AS...SO...(是這樣嗎@@)
還有UNLIKE開頭 注意主詞還有一題我想很久第一題= = the xxx monkey's arm...balabala similar to (that or those)of yyy monkeys.....more than (that or those) monkey's....選項2事先that...those 選項4 先those...that
26. 记得有考到一个 ....come to term with
bring to term at
反正是有term with/at/to什么不同介词，完全不懂，瞎猜的
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