Unit4AGlimpseoftheFuturePeriod2Grammar課件高中英語選擇性

外研選擇性必修第三冊(cè)Unit4Period2Grammar12Toknowsubject-verbagreementinpersonandnumberTousesubject-verbagreementinpersonandnumbercorrectly目標(biāo)一：Toknowsubject-verbagreementonpersonandnumberActivity1:Lookatthesentencesfromthereadingpassageandanswerthequestions.a...50percentofmytimewasspentresearchingnewrestaurants.b

Everyrecommendationshegivesmeisgreat...c...almost50percentofUSjobsareatriskfromautomationinthenext20years.d...noneofusispreparedforthechallengesofAI.1Whyis50percentsingularinsentence(a)butpluralinsentence(c)?Becauseinsentence

(a),thepart

“50percent”

isfollowedbytheuncountablenoun

“time”,

whileinsentence

(c),thepart

“50percent”

isfollowedbythecountablenoun

“job”

initspluralform.2Whatarethesubjectsinsentences(b)and(d)?Aretheysingularorplural?Insentence

(b),thepart

“Everyrecommendation”isthesubject.

Insentence

(d),thepart

“noneofus”

isthesubject.

Botharesingular.NowLookformoresentencesfollowingthisruleinthereadingpassage,andsummarisetheuseofsubject-verbagreementinyourownwords.Nearlyeveryjobis

potentiallyatriskinthelongrun.IbelievemostofthevalueofAIliesin

itscapacitytoanalyseandinterpretvastamountsofdata,...【語法精講】主謂一致是指主語和謂語在人稱和數(shù)等方面的一致，當(dāng)主語是不定代詞或含有修飾語時(shí)，謂語動(dòng)詞的形式要依據(jù)主語所表達(dá)的單、復(fù)數(shù)概念而定，而不僅僅是取決于簡單的外在形式。1）當(dāng)主語被分?jǐn)?shù)（百分?jǐn)?shù)）、表示量的詞匯等修飾時(shí)，謂語動(dòng)詞的形式要依據(jù)主語本身進(jìn)行判斷，如果主語本身是可數(shù)名詞單數(shù)或者不可數(shù)名詞，則謂語動(dòng)詞要用單數(shù)形式；如果主語是可數(shù)名詞復(fù)數(shù)，或主語加上修飾語后整體表達(dá)的意義是復(fù)數(shù)概念，那么謂語動(dòng)詞要用復(fù)數(shù)形式。例如：a.Aboutone-thirdofthebooksinthelibraryaredonatedbystudentswhograduatedfromtheschool.book是可數(shù)名詞，在句中是復(fù)數(shù)形式，并且句中著重于書的數(shù)量而不是將書視作整體，因此“三分之一的書”表達(dá)的意義是復(fù)數(shù)概念，謂語動(dòng)詞用are。b.Around10percentoftheforestisdestroyedeachyear.本句中的theforest為可數(shù)名詞的單數(shù)形式，泛指森林，因此“10%的森林”視作一個(gè)整體，謂語動(dòng)詞用is。c.Alargenumberofpeoplehaveappliedforthejob.本句中的people為集體名詞，表示復(fù)數(shù)概念，因此謂語動(dòng)詞用have。2）當(dāng)主語被不定代詞修飾或主語本身是不定代詞時(shí)，謂語動(dòng)詞的形式需要根據(jù)主語加上修飾語后整體表達(dá)的意義來進(jìn)行判斷。例如：a.Everymeanshasbeentriedoutwithoutmuchresult.everymeans強(qiáng)調(diào)每一種方法，故謂語動(dòng)詞用單數(shù)形式。b.Alloftheworkisdonebyme.work表示“工作”時(shí)為不可數(shù)名詞，故allofthework視作整體，謂語動(dòng)詞用單數(shù)形式。3）當(dāng)主語被否定詞修飾或主語本身是否定詞時(shí)，謂語動(dòng)詞一般用單數(shù)形式。例如：a.Nobodyhasgotaticket.b.Nothingwasavailable.注意，當(dāng)none作主語或主語被none修飾時(shí)，謂語動(dòng)詞一般用單數(shù)形式，但如果主語為可數(shù)名詞復(fù)數(shù)，在非正式表達(dá)中，謂語動(dòng)詞也可用復(fù)數(shù)形式。例如：a.Noneofthepizzaisleft.b.Noneofthepassengerswas/wereawareofthedanger.目標(biāo)二:Tousesubject-verbagreementcorrectly

Activity1:Completethepassagebychoosingthesingularorpluralform.Nowadays,somecompaniesoffergenetictestingforchildren’stalents.Alargenumberofclientshave/hasbeenattractedtoit.Theyareparents,eagertoknowwhattalentstheirchildrenmayhaveinthefuture.Theprocessissimple.Every

childprovide/providesasmallsampleofbloodorbodytissue.Thisis/Theseareanalysed.Eachofthechildrenis/aregivenareportshowingtheirpossibletalents.Arecentexamplecitedonthewebsiteisthatoneofthetestingcompaniescompare/comparesthetalentsoftwinsBobby

andBenny.Bobbywasassessedandhistalentswas/wererevealedtobemostlyscientific:a66%chanceofsuccessinchemistryand54%inphysicswas/wereshown.Meanwhile,Benny’shighestscorewas/wereshowntobeinanartssubject:thetestgavehim68%forliterarystudies.

Isgenetictestingreliable?Somescientistssaythatmoreevidenceis/areneeded.Activity2:Completethedescriptionaccordingtothecharts,payingattentiontosubject-verbagreement.Threequartersofthesurfaceismadeupofland,...Sample:Threequartersofthesurfaceismadeupofland,whiletherestissea,covering25%ofthesurface.

Halfofthelandiscoveredwithtrees.Residentialareaandarablelandbothaccountforthesame

proportion,20%ofthetotalland.Therestisdesert,covering10%ofthetotalland.

Therearethreekindsofpeople.Fiftypercentofthepeopleareoriginalresidents,30%arefromEarthand20%arefromotherplanets.Activity3:Describeanotherplanetforthefuture,payingattentiontosubject-verbagreement.Ontheplanet,halfofthesurfaceismadeupofland,theotherhalfissea.Onethirdofthelandiscoveredwithtrees.Residentialare