OG12 SC动词形式.docx

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OG12 SC动词形式.docx

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OG12 SC动词形式.docx

OG12SC动词形式

OG12SC动词形式

3.Althoughvariouseighteenth-andnineteenth-century AmericanpoetshadprofessedaninterestinNative AmericanpoetryandhadpretendedtoimitateNative Americanformsintheirownworks,untilalmost1900, scholarsandcriticsdidnotbeginseriouslytostudy traditionalNativeAmericanpoetryinnative languages.

(A)untilalmost1900,scholarsandcriticsdidnot beginseriouslytostudy

(B)untilalmost1900scholarsandcriticshadnot begunseriouslystudying

(C)notuntilalmost1900werescholarsandcritics tobeginseriouslytostudy

(D)itwasnotalmostuntil1900whenscholarsand criticsbegantoseriouslystudy(E)

(E)itwasnotuntilalmost1900thatscholarsand criticsseriouslybeganstudying

解释:

从句已经使用过去完成时,主语需要使用过去时。

过去完成时是过去的过去,需要与过去时同时出现。

所以主句用hadnotbegun就是错误的。

4.Ofallthevasttidesofmigrationthathaveswept throughhistory,maybenoneismoreconcentratedas thewavethatbrought12millionimmigrantsonto Americanshoresinlittlemorethanthreedecades.

(A)maybenoneismoreconcentratedas

(B)itmaybethatnoneismoreconcentratedas 

(C)perhapsitisnonethatismoreconcentratedthan

(D)maybeitisnonethatwasmoreconcentrated than(E)

(E)perhapsnonewasmoreconcentratedthan

解释:

OG上说因为句子的后半部分用了过去时brought,所以前面也要用was。

(我不知道为什么,不理解这一点,也没找到能说服我的解释。

哪位大牛跟我讲解下啊。

8.Thewidelyacceptedbigbangtheoryholdsthatthe universebeganinanexplosiveinstanttentotwenty billionyearsagoandhasbeenexpandingeversince.

(A)thattheuniversebeganinanexplosiveinstant tentotwentybillionyearsagoandhasbeen expanding

(B)thattheuniversehadbeguninanexplosive instanttentotwentybillionyearsagoandhad beenexpanding

(C)thatthebeginningoftheuniversewasan explosiveinstanttentotwentybillionyearsago thathasexpanded

(D)thebeginningoftheuniversetohavebeenan explosiveinstanttentotwentybillionyearsago thatisexpanding(A)

(E)theuniversetohavebeguninanexplosive instanttentotwentybillionyearsagoandhas beenexpanding

解释:

动词时态:

有明显时态标志一定遵守,Ago过去时标志,Eversince现在完成时态标志,Since只能+现在完成时和现在完成进行时,现在完成时使用,在GMATSC常见的标志:

since+过去时间点,within/over/during/in+时间段。

动词形式:

Began优于inthebeginning

10.Carnivorousmammalscanendurewhatwould otherwisebelethallevelsofbodyheatbecausethey haveaheat-exchangenetworkwhichkeptthebrain fromgettingtoohot.

(A)whichkept

(B)thatkeeps

(C)whichhaskept

(D)thathasbeenkeeping(B)

(E)havingkept

解释:

没有找到使用过去时态的理由,句中时态一致。

对完成时态要敏感,完成时表示不再。

表示现象道理时,用一般现在时。

16.Retailsalesrose0.8of1percentinAugust, intensifyingexpectationsthatpersonalspendingin theJulv-Septemberquartermorethandoubledthat ofthe1.4percentgrowthrateinpersonalspending forthepreviousquarter.

(A)thatpersonalspendingintheJuly-September quartermorethandoubledthatof

(B)thatpersonalspendingintheJuly-September quarterwouldmorethandouble

(C)ofpersonalspendingintheJuly-September quarter,thatitmorethandoubled

(D)ofpersonalspendingintheJuly-September quartermorethandoublingthatof(B)

(E)ofpersonalspendingintheJuly-September quarter,thatitwouldmorethandoublethatof

解释:

主句过去时,Expectations接would,过去将来时,知道八月,九月的事情还不知道,是未来的事情。

19.TheIroquoiswereprimarilyplanters,butsupplementing theircultivationofmaize,squash,andbeanswith fishingandhunting.

(A)butsupplementing

(B)andhadsupplemented

(C)andeventhoughtheysupplemented

(D)althoughtheysupplemented(D)

(E)butwithsupplementing

解释:

过去完成时用在这里毫无意义,应该和主句一样用一般过去时。

23.Inapreviousdesign,theweightofthediscususedin trackcompetitionisconcentratedinametalcenter, butnowitislinedwithleadaroundtheperimeter, therebyimprovingstabilityinflightandresultingin longerthrows.

(A)Inapreviousdesign,theweightofthediscus usedintrackcompetitionisconcentratedina metalcenter,butnowitis

(B)Accordingtoapreviousdesign,theweightof thediscususedintrackcompetitionwas concentratedinametalcenter,butnowitis

(C)Oncedesignedwithitsweightconcentrated inametalcenter,thediscususedintrack competitionisnow

(D)Thediscususedintrackcompetition,once designedwithitsweightconcentratedinametal center,butnow(C)

(E)Thediscususedintrackcompetitionwasonce designedhavingitsweightconcentratedina metalcenterandnow

解释:

句中有明显的时间标志,所以表示过去设计的那个从句的动词应该用一般过去式。

34.Beyondtheimmediatecashflowcrisisthatthe museumfaces,itssurvivaldependsonifitcan broadenitsmembershipandleaveitscramped quartersforasitewhereitcanstoreandexhibitits morethan12,000artifacts.

(A)ifitcanbroadenitsmembershipandleave

(B)whetheritcanbroadenitsmembership andleave

(C)whetherornotithasthecapabilitytobroaden itsmembershipandcanleave

(D)itsabilityforbroadeningitsmembership andleaving(B)

(E)theabilityforittobroadenitsmembership andleave

解释:

Can更加简洁,优于ability,capacity。

On介词后面+名词性从句。

41.Todevelopmoreaccuratepopulationforecasts, demographershavetoknowagreatdealmorethan nowaboutthesocialandeconomicdeterminantsof fertility.

(A)havetoknowagreatdealmorethannowabout thesocialandeconomic

(B)havetoknowagreatdealmorethantheydo nowaboutthesocialandeconomical

(C)wouldhavetoknowagreatdealmorethanthey donowaboutthesocialandeconomical

(D)wouldhavetoknowagreatdealmorethanthey donowaboutthesocialandeconomic(D)

(E)wouldhavetoknowagreatdealmorethannow aboutthesocialandeconomic

解释:

Todo表目的,表示未来的还未发生的,所以与现在知道的对比,要用虚拟语气,使用would。

42.Scientistshaverecentlydiscoveredwhatcouldbethe largestandoldestlivingorganismonEarth,agiant fungusthatisaninterwovenfiligreeofmushroomsand rootliketentaclesspawnedbyasinglefertilizedspore some10,000yearsagoandextendingformorethan 30acresinthesoilofaMichiganforest.

(A)extending

(B)extends

(C)extended

(D)itextended(A)

(E)isextending

解释:

注意动作的发出者和动作的承受者。

spawned过去分词,表被动,状态,注意By;extending现在分词表主动,进行时。

47.Fivefledglingseaeagleslefttheirnestsinwestern Scotlandthissummer,bringingto34thenumberof wildbirdssuccessfullyraisedsincetransplantsfrom Norwaybeganin1975.

(A)bringing

(B)andbrings

(C)anditbrings

(D)anditbrought(A)

(E)andbrought

解释:

句子时态要一致:

BC错误应是过去时。

64.Doctorsgenerallyagreethatsuchfactorsascigarette smoking,eatingrichfoodshighinfats,andalcohol consumptionnotonlydodamagebythemselves butalsoaggravategeneticpredispositionstoward certaindiseases.

(A)notonlydodamagebythemselvesbutalsoaggravate

(B)dodamagebythemselvesbutalsoaggravatingto

(C)aredamagingbythemselvesbutalsoareaggravating

(D)notonlydodamagebythemselves,theyarealsoaggravatingto(A)

(E)aredoingdamagebythemselves,andtheyarealsoaggravating

解释:

此处用现在进行时没有根据,不能随意更换时态。

69.Oncetheyhadseenthereportfromthemedical examiner,theinvestigatorsdidnotdoubtwhether thebodyrecoveredfromtheriverwasthemanwho hadattemptedtoescapefromthestateprison.

(A)didnotdoubtwhetherthebodyrecoveredfrom theriverwas

(B)havenodoubtwhetherthebodyrecovered fromtheriverwas

(C)hadnotdoubtedthatthebodyrecoveredfrom theriverwas

(D)havenodoubtwhetherthebodyrecovered fromtheriverwasthatof(E)

(E)hadnodoubtthatthebodyrecoveredfromthe riverwasthatof

解释:

从句过去完成时,主句用过去时态。

有过去完成时,需要有过去时与之成对,BD排除。

 

70.Hisstudiesofice-polishedrocksinhisAlpine homeland,faroutsidetherangeofpresent-day glaciers,ledLouisAgassizin1837toproposethe conceptofanageinwhichgreaticesheetshad existedinnowcurrentlytemperateareas.

(A)inwhichgreaticesheetshadexistedinnow currentlytemperateareas

(B)inwhichgreaticesheetsexistedinwhatare nowtemperateareas

(C)whengreaticesheetsexistedwheretherewere areasnowtemperate

(D)whengreaticesheetshadexistedincurrent temperateareas(B)

(E)whengreaticesheetsexistedinareasnowthat aretemperate

解释:

动词时态:

过去完成时是过去的过去,要和过去时同时出现;Current,Now现在时,动词自身时态严格遵守C错;ADhadexisted过去完成时,不能和now/current同时出现。

解题技巧:

1、过去完成时和过去时同时出现。

2、一般过去时和一般现在时可时态混用,不存在过去完成时和一般现在时的时态混用。

3、看到now,敏感一般过去时和一般现在时的混用。

73.Combiningenormousphysicalstrengthwithhigher intelligence,theNeanderthalsappearasequippedfor facinganyobstacletheenvironmentcouldoutintheir path,buttheirrelativelysuddendisappearanceduring thePaleolithiceraindicatesthataninabilitytoadapt tosomeenvironmentalchangeledtotheirextinction.

(A)appearasequippedforfacinganyobstaclethe environmentcouldputintheirpath,

(B)appeartohavebeenequippedtofaceany obstacletheenvironmentcouldputintheirpath,

(C)appearasequippedtofaceanyobstaclethe environmentcouldputintheirpaths,

(D)appearedasequippedtofaceanyobstaclethe environmentcouldputintheirpaths,(B)

(E)appearedtohavebeenequippedforfacingany obstacletheenvironmentcouldputintheirpath,

解释:

动词时态:

关注未划线,一般现在时,改变时态要有根据,排除DE。

74.A1972agreementbetweenCanadaandtheUnited Statesreducedtheamountofphosphatesthat municipalitieshadbeenallowedtodumpintothe GreatLakes.

(A)reducedtheamountofphosphatesthat municipalitieshadbeenallowedtodump

(B)reducedthephosphateamountthat municipalitieshadbeendumping

(C)reducesthephosphateamountmunicipalities havebeenallowedtodump

(D)reducedtheamountofphosphatesthat municipalitiesareallowedtodump(D)

(E)reducestheamountofphosphatesallowedfor dumpingbymunicipalities

解释:

phosphate的倾倒在协议后是一直继续的,所以应该用wereallowed或者areallowed。

协议的时间有明显过去的标志,要用reduced。

75.Aproposalhasbeenmadetotrimthehornsfrom rhinocerosestodiscouragepoachers;thequestio

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