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　　1、Introduced from….and过去分词(和Introduced 平行)，主语，同位语，谓语，宾语。<我的答案>

　　2、Because the heartof birds is easily 发散 through fleet，the birds 主谓宾.

　　——意思是:避免热量发散，鸟用一只脚站着，另一只脚藏在羽毛里面。选项A里面的their指代错误。C是due to开头，错误。D里面有being，读着不顺。E，句子凌乱，不对。

　　3、commutersanalyses and recommend or initiate date from…generation(题干)

　　——这题大意是电脑可以帮助人类V1，V2，V3，就是考这三个词的意思，奇怪为什么recommend or initiate之间要用or，每个选项都是这样的。答案有的是V2和V3做伴随状语。

　　4、一群人do… than do另一群人. <我的答案>

　　53

　　1.(类似)地理的，生物的和历史的research (have/has)……

　　2. JJ33谁谁谁的书讨论的文化是taken from —— and indeed extensively discussed(这个单词不是很确定) in——that blablalbla， 记得第二个破折号后面好像跟的名词，我反正选的这个，很平行

　　3. XXXXXX should not impose, and never have imposed(这个地方忘记了)，后面跟了一个名词啥啥啥的

　　4. The cells of frogs and另一种动物 能干啥干啥(好像有毒能干嘛干嘛)，后面接了一个连词，划线部分在后面，predators have eaten them(貌似用了完成时)，选项里也有说eatanimals之类的。

　　5.这题不大记得了，XXXXXX all but one of them(选项有which)，possess(possessing/possesses)，考点在这儿。

　　54

　　一个语法题，大意如此一个气象现象，always developed xx,xx and xxx， produced 在太平洋还是大西洋。

　　考点是插入语和谓语修饰。

　　55 680

　　有几道题比较纠结，印象最深的就是有5个there seem(s) to be 什么什么 studies on什么什么 然后有一个consider的考点

　　纠结在B里是seems 但是consder 用得对是 consider A B, 然后D里是seem consider用的as being E里是seem consider 用的 to be

　　我就不说我的答案了，也不知道对不对。

　　56 感谢Idontcare4u

　　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 dorested 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

　　正确答案是D

　　顺便附上精彩点评

　　考点：

　　1. 平行，关于not only…but also，后面会详述

　　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在此没有错，例见本题后补充的大全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之前分句缺谓语

　　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.

　　Not only but also补充说明【摘自PREP08】：

　　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,

　　1、Not only…..but (also)表示的关系是递进, 其中also可以省略

　　2、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.

　　3、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，此时表示的是转折，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

　　(E) deaths, thousands are injured, and they do serious damage to

　　选D PS：A and B, as well as C是正确的用法——这一点在本月机经中也有考到!

　　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:

　　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(有例外)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

　　(E) but also causing damage or destroying

　　选D

　　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)

　　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&apost fear not only hardship but also death.

　　正： They fear neither hardship nor death.

　　正： They don&apost fear either hardship or death.

　　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是: Not only did they break into his office and steal his books, but they also tore up his manuscripts.

　　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中but also被主语+助动词拆开:

　　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 rerences.

　　A. they in addition falsified their rerences

　　B. they had their rerences falsified in addition

　　C. but they had also falsified their rerences

　　D. they had also falsified their rerences

　　E. but their rerences were falsified as well

　　选C

相关链接：

1.GMAT考试 5月10日更新GMAT语法机经（九）

2.GMAT机经汇总 5月7日更新GMAT作文AI部分机经

3.盘点GMAT语法考试的常用公理

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