GMAT Verb Tense,Mood,Voice-豆柴文库

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Manhattan

SIMPLEPRESENTgeneraldefinitions
SimpleTenses
(Ingeneral,theGMAT
prefersthesimpletenses)SIMPLEPASTaspecific,completedtimeperiod
express"eternal"statesor
Inamoresubtleexample,youcanuse
frequentevents
SIMPLEFUTUREfutureactionsthePastProgressivetodescribea
backgroundevent,whileyouuse
SimplePasttodescribeamore
ProgressiveTenses
PRESENTPROGRESSIVEimportanteventintheforeground.(语
(ongoing,happeningright
义不在一个层级)
now)
VerbsthatexpressPASTPROGRESSIVE
generalstatesdonot
KeepVerbnormallytakeprogressive
TensesformsFUTUREPROGRESSIVE
Consistent,
However,StillInEffect…Whetheritindicatescontinued
PRESENTactionorcontinuedeffect.Thefor,
somethePresentPerfectindicateseithercontinuedactionorcontinuedeffectofa
PERFECT=PresentPerfecttensemakesasince,
sentencescompletedaction.
withmoreHAVE/HAS+Paststatementaboutthepresentwithin
thanoneParticipletime.
actiondoThePerfectTenses:
requireyouIfanactionbeganinthe
toswitchpastandcontinuesintoonlytoclarifyoremphasizeasequenceofpastevents.BUTifthesequenceisalready
VERB
verbtenses.thepresent(oritseffectobvious,weoftendonotneedPastPerfect.
TENSE
does),usethePresent
(Meaning)
Perfecttense.Ifone
actioninthepastTheEarlierAsequenceofverbswiththesamesubjectdoesnotrequirePastPerfect.Rather,use
precedesanother,andAction(alsoindicatetheSimplePastforalltheverbs.
needtoclarifyorcontinuedeffect)donotalwaysusethePastPerfect
PASTforearlieractions.
emphasizethetimeClauseslinkedbyandorbutdonotrequirethePastPerfectasageneralrule.
sequence,thenusethePERFECT=HAD+
PastPerfecttense.PastParticiple
Thewordsbeforeandafterindicatethesequenceofeventsclearlyandemphatically
enoughto
maketheuseofthePastPerfectunnecessary.
thelaterpasteventdoesnotneedtobeexpressedwithaSimplePasttenseverb.Just
useadateoranothertimereference.

CONDITIONAL
TENSE,
whichisformedbyPresent+Future
Withapasttense
combiningwould
reportingverb.move
withthebaseform
TensePresenttoPast.Pastto
oftheverb.
SequencePastPerfect.andFuture
Thehelpingverb
toConditional(thatis.
wouldexpresses
willtowould).