课件英语选择性必修三Unit4Usinglanguage

Unit4AglimpseofthefutureUsinglanguageSubject-verbagreement(2)BYMICHELLEGrammar01Lookatthesentencesfromthereadingpassageandanswerthequestions.a.…50percentofmytimewasspentresearchingnewrestaurants.b.Everyrecommendationshegivesmeisgreat...

c.…almost50percentofUSjobsareatriskfromautomationinthenext20years.d.…noneofusispreparedforthechallengesofAI.

1.Whyis50percentsingularinsentence(a)butpluralinsentence(c)?2.Whatarethesubjectsinsentences(b)and(d)?Aretheysingularorplural?Becauseinsentence(a),thepart“50percent”isfollowedbytheuncountablenoun“time”,whileinsentence(c),thepart“50percent”isfollowedbythecountablenoun“job”initspluralform.Insentence(b),thepart“Everyrecommendation”isthesubject.Insentence(d),thepart“noneofus”isthesubject.Botharesingular.Nowlookformoresentencesfollowingthisruleinthereadingpassage,andsummarisetheuseofsubject-verbagreementinyourownwords.Nearlyeveryjobispotentiallyatriskinthelongrun.Thetechnologyyou’reusingandenjoyingtodayisabasicformofAI...IbelievemostofthevalueofAIliesinitscapacitytoanalyseandinterpretvastamountsofdata...Grammar:Subject-verbagreement主谓一致Theboy_____diving.They_____diving.BothJackandTim_____diving.Allofthem_____diving.NeitherJacknorTim_____walking.isareareisareFinishthefollowingexercises:主谓一致是指主语和谓语在人称和数等方面的一致，当主语是不定代词或含有修饰语时，谓语动词的形式要依据主语所表达的单、复数概念而定，而不仅仅是取决于简单的外在形式。如果主语本身是可数名词单数或者不可数名词，则谓语动词要用单数形式；Around10percentoftheforestisdestroyedeachyear.每年大约有10%的森林被毁。如果主语是可数名词复数，或主语加上修饰语后整体表达的是复数概念，那么谓语动词要用复数形式。Aboutone-thirdofthebooksinthelibraryaredonatedbystudentswhograduatedfromtheschool.图书馆里大约三分之一的书都是由这所学校的毕业生捐赠的。

当主语被分数（百分数）、表示量的词汇等修饰时，谓语动词的形式要依据主语本身进行判断常用的表示“量”的短语后面接名词的谓语情况anumberof/avarietyof/varietiesof+可数名词复数作主语时，谓语动词用复数形式。alargeamountof+不可数名词，谓语动词用单数；largeamountsof+不可数名词，谓语动词用复数。Anumberofnewhouseshavebeenbuiltthere.Avarietyofproductsareonsalenow.Alargeamountofmoneywasspentonthebridge.Largeamountsofmoneywerespentonthebridge.当主语被不定代词修饰或主语本身是不定代词时，谓语动词的形式需要根据主语加上修饰语后整体表达的意义来进行判断Everymeanshasbeentriedoutwithoutmuchresult.所有方法都试过了，却没有什么效果。Practice：1)Eachboy______aprize.2)Manyofus_____gonethroughregulartraining.3)Everypossibleapproach______beentried,butinvain.4)Bothoftheinstruments_____notpreciseones.5)Something_____goingtohappen,andnobodycanstopitfromhappening.havehasaregetsisall作主语表示人时，谓语动词用复数；表示物时，谓语动词用单数Alliswellthatendswell.结果好一切都好。Allareeagertoreachanagreement.大家都急于达成一项协议。none作主语时，谓语动词既可用单数也可用复数，这要取决于说话人的看法Noneofusseemtohavethoughtofit.似乎我们全都没有想到这一点。（此处强调全体，全部都没有想到。）Noneofushasgotacamera.(none=notasingleone)我们都没有照相机。

（此处强调每一个个体，没有一个有照相机的。）当主语被否定词修饰或主语本身是否定词时，谓语动词一般用单数形式Nothingelsematterstohimapartfromhisjob.对他来说，除了工作以外，什么事都无关紧要。Nobodyknowswhatthefutureholdsforus.没有人知道我们的未来会怎样。Nobodyhasgotaticket.

谁都没有票。Nothingwasavailable.

没有可用的。Completethepassagebychoosingthesingularorpluralform.Nowadays，somecompaniesoffergenetictestingforchildren’stalents.Alargenumberofclientshave/hasbeenattractedtoit.Theyareparents，eagertoknowwhattalentstheirchildrenmayhaveinthefuture.Theprocessissimple.Everychildprovide/providesasmallsampleofbloodorbodytissue.Thisis/Theseareanalysed.Eachofthechildrenis/aregivenareportshowingtheirpossibletalents.Arecentexamplecitedonthewebsiteisthatoneofthetestingcompaniescompare/comparesthetalentsoftwinsBobbyandBenny.Bobbywasassessedandhistalentswas/wererevealedtobemostlyscientific：a66%chanceofsuccessinchemistryand54%inphysicswas/wereshown.Meanwhile，Benny’shighestscorewas/wereshowntobeinanartssubject：thetestgavehim68%forliterarystudies.Isgenetictestingreliable?Somescientistssaythatmoreevidenceis/areneeded.

Completethedescriptionaccordingtothecharts,payingattentiontosubject-verbagreement.FUTURELastweek，weaskedyoutodesignyouridealplanetforpeopleonEarthtoliveoninthe22ndcentury.Wehavereceivedover500entriesandhavebeenamazedbyyourimaginations!Here’soneofthedesigns. Threequartersofthesurfaceismadeupofland，whiletherestissea，covering25%ofthesurface.Halfofthelandiscoveredwithtrees.Residentialareaandarablelandbothaccountforthesameproportion，20%ofthetotalland.Therestisdesert，covering10%ofthetotalland.Therearethreekindsofpeople.Fiftypercentofthepeopleareoriginalresidents，30%arefromEarthand20%arefromotherplanets. Describeanotherplanetforthefuture,payingattentiontosubject-verbagreement.Thefollowingquestionsmaybeofhelptoyou:Istheresomewaterforitsresidentstouse?Isthetemperatureonthatplanetsuitableforpeopletolivein?Herearesomewordsforsomeplanets:Venus:金星Mercury:水星Mars:火星Jupiter:木星Saturn:土星Listening&Speaking02TheworldoftomorrowDidYouKnow?

Timetravelcouldresultinaparadox—aneventthatcontradictsitself.Forexample，ifapersontravelledbackintimeandpreventedanevent，thateventwouldneverhavehappened；therewouldthereforebenoreasonforthepersontotravelbackintimetopreventit.Listentotheconversationandchooseitsmainidea.Timetravelisdangerous.Talkingtopeopleinthepastcanchangethefuture.Anythingyousayordointhepastcanaffectthefuture.4.Timetravelwithinyourownlifetimeshouldbeavoided.Listenagainandcompletethetable.Don’ttalktoanybodytellher8-year-oldselftobuysharesincompaniesthatareprofitabletodayshewantstobecomerichnottodothatBecarefulnottobreakanything.breakingsomethingcouldalsocauseaparadoxandchangeyourpaththroughlife.Nevergiveanythingfromourtimetosomeoneinthepast.giveapresenttohisfatheranythingthatdoesn’tbelongtothattimemayhaveanimpactonsomeoneandcauseaparadox.Nowworkinpairs.Taketurnstobetheguideandexplaintherulesoftimetravel.Sentencesthatmayhelpyouexplaintherules:1.Therearealtogether3rulesoftimetravel.Thefirstis...,thesecondis...,andthelastoneis...2.Thereare3rulesoftimetravelintotal.Thefirstis...,thesecondis...,andthelastoneis...3.Everytouristissupposedtobear3rulesoftimetravelinmind.Thefirstis...,thesecondis...,andthelastoneis...Completetheboxeswiththeexpressionsfromtheconversation.Amazing!Wow!Ican’twaitto...So,whatyou’resayingisthat...Howabout...Imaginehowexcited...

That’sOk,isn’tit?Areyouserious?Letmegetthisstraight.Youmeanthat...It’llbeexcitingenoughto...ExpressingexcitementAskingforconfirmationAmazing!Wow!Ican’twaitto...Imaginehowexcited...It’llbeexcitingenoughto...So，whatyou’resayingisthat...Howabout...That’sOK，isn’tit?Areyouserious?Letmegetthisstraight.Youmeanthat...

VocabularyBuilding03Readthepassageandputtheexpressionsinboldintotheboxes.Besidestimetravel，wehavemuchtolookforwardtointhefuture，thankstoadvancesintechnology.Oneareathatislikelytochangedramaticallywithinourlifetimesismedicalcare.AlthoughIwouldn’tbankonpatientsfeelingconfidentaboutseeingarobotdoctoranytimesoon，I’msurethatAIdoctorsareonthehorizon.Ithinkit’salsofairtosaythatwecangetourhopesupwhenitcomestofindingcuresforseriousdiseases，suchascancer.I

reckon

thatnanorobotsthatcaneliminatecancerouscells

arejustaroundthecorner.Someoftheseideasmaysoundfaraheadoftheirtime，butI’msurethey’reboundtohappensoonerorlater!ExpressionsabouttimeExpressionsaboutexpectationwithinourlifetimesanytimesoononthehorizonaroundthecornerfaraheadoftheirtimebankongetourhopesupboundtohappenCompletethepassagewiththeexpressionsinActivity8.Whoknowsinwhatexcitingwaystransportwillchange1

?Trainsthattravelatthespeedoftoday’saeroplanesmaysound2

butscientistsarealreadydeveloping“hyperloop”trainsthattravelatover1，000kmperhour.Andalthoughwecan’t3

flyingcarsbeingthenorm4

，thereareplanstointroduceflyingtaxisthatwillbestationedonrooftopsaroundbusycities.ManycitiesalreadyhaveelevatedcyclepathsandI’msurethattheseare5

formanyothersaroundtheworld.Aswellasfaster，saferandmorecomfortable