2026年情态动词can检测试题及答案

2026年情态动词can检测试题及答案

一、单项选择题，(总共10题，每题2分)1.—Excuseme,______Iborrowyourdictionaryforaminute?—Sure,hereyouare.A.mustB.needC.canD.should2.ThedoctorsaysJim______walkwithoutcrutchesnextweekiftheswellinggoesdown.A.canB.mustC.oughtD.would3.Noone______enterthechemicallabwithoutprotectivegoggles;it’sastrictrule.A.canB.mayC.mustD.might4.In2025,passengers______paybusfaresinLondonsimplybylookingatthescanner—face-recognitiontechnologymadeitpossible.A.canB.couldC.wouldD.should5.I’mafraidwe______finishthereporttoday;thedataservercrashedagain.A.can’tB.mustn’tC.needn’tD.shouldn’t6.______youspeakmoreslowly?Theonlineinterpreterkeepslagging.A.MustB.CanC.ShouldD.Will7.Duringtheblackouteventhehospitalgenerator______powerthewholeICUformorethansixhours.A.can’tB.mustn’tC.needn’tD.shouldn’t8.AccordingtothenewEUlaw,childrenunder14______openasocial-mediaaccountevenwithparentalconsent.A.can’tB.mustn’tC.shouldn’tD.mightnot9.Ifyouheatthealloyto800°C,it______withstandpressuretwiceashighassteel.A.canB.couldC.wouldD.should10.—I’velockedmykeysinsidethelab.—Don’tworry,thetechnician______openthemagneticdoorfromthemainconsole.A.canB.mustC.shallD.ought二、填空题，(总共10题，每题2分)11.Withtheupdatedvisapolicy,touristsfrom54countries______stayinHainanfor30dayswithoutavisa.12.I’msorry,butwe______guaranteenext-daydeliveryduringtheSpringFestivalrush.13.IfyoupracticewiththeVRmoduleeveryday,you______masterthesurgicalstepsintwoweeks.14.Ifthehumidityrisesabove70%,thesensor______givefalsereadings.15.Inanemergency,anycrewmember______activatetheautomaticshutdown.16.Thelibrarianremindedusthatwe______renewreferencebooksonline;theymustbereturnedinperson.17.Withthenewfirmware,thedrone______flyatminus30°Cwithoutbatteryfailure.18.Accordingtotheschoolcharter,nostudent______leavecampusafter22:00withoutwrittenpermission.19.Duringthepandemic,onlythreevisitors______seeapatientatthesametime.20.Ifyoupresstheredbutton,themachine______resettofactorysettingsimmediately.三、判断题，(总共10题，每题2分)21.“Can”istheonlymodalthatexpressesbothabilityandpermissioninpresent-dayEnglish.22.Thenegative“cannot”iswrittenasonewordinBritishEnglishbutisoftensplitinAmericanlegaltexts.23.“Can”changesto“could”inallreported-speechcontextswithoutanymeaningshift.24.Thepastformof“can”forabilityisalways“was/wereableto,”never“could,”whenreferringtoasinglecompletedachievement.25.Inquestions,“can”ismorepolitethan“may”whenaskingforpermission.26.“Can’thelpbutlaugh”isgrammaticallyacceptableinstandardcontemporaryEnglish.27.Thecontraction“can’t”canbeusedtoexpressdeduction,similarto“must”inthenegative.28.“Can”hasnoinfinitiveform;therefore,itisreplacedby“tobeableto”innon-finitecontexts.29.Inscientificwriting,“can”isoftenavoidedtoreducesubjectivityandisreplacedby“isableto.”30.Thephrase“canpossibly”isredundantandshouldalwaysbeeditedout.四、简答题，(总共4题，每题5分)31.Explainwhy“could”ratherthan“can”isnormallyusedintentativerequests,andprovidetwooriginalexamples.32.Statetwosemanticdifferencesbetween“can’t”usedforinabilityand“can’t”usedforprohibition,illustratingeachwithashortdialogue.33.Describetherulethatgovernstheswitchfrom“can”to“beableto”inperfecttenses,andgiveoneaffirmativeandonenegativesentence.34.Howdoesthemodal“can”interactwithadverbsoffrequencysuchas“always”or“rarely”?Providetwocorrectlyorderedsentencesandcommentonmeaning.五、讨论题，(总共4题，每题5分)35.DiscussthesociolinguisticfactorsthatinfluencewhetherBritishEnglishspeakersprefer“can”or“may”whengrantingpermissiontoanequal,andpredicthowthischoicemightevolveby2040.36.Evaluatetheclaimthattheincreasinguseof“can”insteadof“may”indigitalcustomer-servicechatbotscontributestotheperceivederosionofpolitenessinonlinecommunication.37.Comparethepedagogicaladvantagesanddisadvantagesofteaching“can”forabilityseparatelyfrom“can”forpermissioninthefirstyearofsecondaryschool.38.Analyzehowautomaticgrammarcheckersflag“can”inacademicmanuscriptsandassesswhethertheirsuggestionsimproveorobscurescientificmeaning.答案与解析一、单项选择题1C2A3C4A5A6B7A8A9A10A二、填空题11can12can’t13can14can15can16can’t17can18can19can20can三、判断题21T22T23F24F25F26T27T28T29T30F四、简答题答案31.“Could”signalsdistanceandtentativeness,loweringimposition.Examples:“Couldyouforwardtheemail?”“CouldIaskaquickquestion?”Using“can”herewouldsoundblunt.32.Inability:“Ican’tswimyet.”Prohibition:“Youcan’tenter;staffonly.”Thefirstdenoteslackofskill;theseconddenotesarule.33.“Can”hasnopastparticiple,so“beableto”replacesit.Affirmative:“Shehasbeenabletocodesince2020.”Negative:“Wehaven’tbeenabletoreplicatetheresult.”34.Adverbprecedes“can”:“Shecanalwaysspottheerror”meansoneveryoccasion.“Hecanrarelystayawake”meansalmostnever.Positionaffectsscope,notgrammaticality.五、讨论题答案35.Britishspeakersweighage,socialdistance,andformality.“May”indexesdeferencebutsoundsarchaictounder-30s.By2040,corpusdatasuggest“can”willdominateevenformaldomains,drivenbyegalitariandigitalculture,though“may”survivesinlegallanguage.36.Chatbotsprioritizeclarityandprocessingspeed;“can”reducessyntacticcomplexity.Usersinterpretthisasabrupt,yetrepetitionnormalizesit,shiftingpolitenessnormsfromlexicalmodalitytodiscoursemark