2 主语⽐较特殊形式
2.1 双重⽐较：(主语+状语 vs.主语+状语，⼀般需要⽤those，that等) 单纯主语 GWD3-30
Today's technology allows manufacturers to make small cars that are more fuel-efficient than those at any other time inproduction history.(不能⽤they) 37.GWD25-Q37.
Though the law will require emissions testing of all diesel vehicles, from tractor trailers to excursion buses, it will have noeffect on sport utility vehicles, almost all of which are gasoline powered and therefore not subject to emissions-controlstandards as stringent as those for diesel-powered vehicles.
(as stringent as 修饰standards，后⾯的those也指代standards，可以改成：not subject to emissions-control standardsas stringently as diesel-powered vehicles are，are必须补出来，否则可能表⽰跟standard进⾏⽐较 )
Paper production accounts for approximately 40 percent of the world's industrial use of wood, and the market for paper isgrowing faster than the market for all other major wood products. 114.(30583-!-item-!-188;#058&004275)s
A study on couples' retirement transitions found that women who took new jobs after retiring from their primary careersreported high marital satisfaction, more so than those who retired completely. 主语加谓语
According to public health officials, in 1998 Massachusetts became the first state in which more babies were born towomen over the age of thirty than under it.
Four times as many Americans were killed as (those that ) would later be killed (⽐较双⽅省略，突出⽐较对象本⾝。) Prep2-96.(29547-!-item-!-188;#058&004302)
There are hopeful signs that we are shifting away from our heavy reliance on fossil fuels：more than ten times as muchenergy is generated through wind power now as was the case (generated through wind power now than it was ) in 1990.(括号中的部分不对，因为⽤了it) (可以改成 as was generated in 1990)
Those small domestic mills will take more business from the big American steel mills than (those that) would have beentaken by the foreign steel mills in the absense of quotas.(主动、被动⽐较)
Currently, researchers collect far more background information on patients than (that which) is strictly required for theirtrials.(省略that which) GWD7-Q4:
Only seven people this century have been killed by the great white shark, the man-eater of the movies— fewer than havebeen killed by bee stings.
nearly eight million people，as many as are enrolled in the nation's four-year colleges and universities.(省略了thosewho)
Prep2-39.(292-!-item-!-188;#058&003168)
As is the case with traditional pharmacies, prescriptions are the cornerstone of a successful on-line drugstore, since it isprimarily prescriptions that attract the customers, who then also buy other health-related items.
A new genetically engineered papaya was produced not by profit-motivated seed companies, as was the case with mostgenetically modified crops previously approved for commercial use, but by university and United States Department ofAgriculture researchers who allowed growers to use it free of charge. 2.2 整句⽐较
Possible/necessary/previously thought/会省略be动词，如果前⾯加了currently，medically等，be动词就不省略了
Prep1-45
Applying a new method for analyzing the chemistry of tooth enamel, scientists have examined molars of prehumanancestors and determined that their diets were more varied than had been supposed.( than they had been supposed to be ) Prep1-152
Recent research indicates that two popular arthritis drugs may not be as safe as they were initially believed to be. Prep1-43
A one-million-year-old skull bearing traits associated with both Homo erectus and Homo sapiens has been found in theAfar region of Eritrea, indicating that modern humans developed much earlier than previously thought.(than peoplepreviously thought they develop，or what) 77.(286-!-item-!-188;#058&003708)
Scientists have found signs that moving water changed the chemical makeup of the surface of Mars in recent eras andhave therefore concluded that the planet's crust harbors up to three times as much water as previously thought. up to three times as much water as (that which have been )previously thought GWD7-Q32:
A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weakas (the economy) some analysts previously thought (to be). 22.(25727-!-item-!-188;#058&002127)
The company announced that its profits declined much less in the second quarter than analysts had expected and thatits business would improve in the second half of the year.
at speeds much higher than (those that) are currently possible(状语⽐较，⽐较的是主语) areas that exhibit as many of the critical features as (those that are) possible 3 主语⽐较错误形式(不能⽤they/it，要⽤those/that) GWD3-Q30:
Today's technology allows manufacturers to make small cars more fuel-efficient now than at any time in their productionhistory.( C )
A.small cars more fuel-efficient now than at any time in their
B.small cars that are more fuel-efficient than they were at any time in their 不能⽤they C.small cars that are more fuel-efficient than those at any other time in D.more fuel-efficient small cars than those at any other time in their E.more fuel-efficient small cars now than at any time in GWD1-Q16:
Soaring television costs accounted for more than half the spending in the presidential campaign of 1992, a greaterproportion than (it was) in any previous election.(去掉it was。It指proportion，不对) ⼀下为别的⽐较: 34.GWD30-Q34：正确
Books in European libraries last longer than books in libraries in the United States because, although the climate inEurope is fairly humid, libraries there are not subjected to the extremes of temperature and humidity that damage collectionsin the United States.可以的，同⼀套extremes即damage了欧洲的，也damage了美国的。
以上对GMAT语法考试中的常见备考要点进⾏了较为详细的阐述，考⽣不妨以此为鉴，通过反复练习逐步掌握其在GAMT语法考试中的使⽤规律，从⽽在GMAT语法考试中发挥出更好的⽔平
