小學教學教案

Unit13Thewaterplanet教學設計。

Unit13Thewaterplanet
Teachinggoals:
1.Talkaboutwaterandtheocean
2.Practicemakingsuggestionsandexpressingopinions
3.ReviewModalVerbs
4.Writeanexplanationparagraph
TeachingPlan:(SixPeriods)
1stperiod:Warming-upandSpeaking
2ndperiod:Listening
3rdperiod:Reading
4thperiod:IntegratingSkills
5thperiod:Grammar
6thperiod:Exercises
Period1WarmingupSpeaking
TeachingAimsandDemands:
1.TogettheSstounderstandthemainpropertiesofwaterbyconnectingthemwithsomecommonphenomenaandlearningtoexplainthephenomena.
2.Toenablethemtobeawareoftheimportanceofwater,makinggooduseofwaterinaproperwayandprotectingwaterresources.
TeachingDifficultPoint:
Talkabouthowtousewaterandprotectit.
TeachingAids:
Somewater,someoilandaglass;blackboardandmultimedia
TeachingProcedures:
Step1.Lead-in
AsktheSssomequestionsasfollows
T:Waterisaroundusandinsideus.Wecan’tgowithoutwater.Qs:
Whyiswatersoimportanttolivingthings?
Canyoupointoutsomeofitspropertiesorcharacteristics?
Suggestedvocabulary:
Itscolorless,tasteless,odorlessanduniversaldissolvent.
Itfeelswet;
Itexistsinthreeforms:liquid,solid,gas,andiscycledthroughthewatercycle;
Itcanabsorbalargeamountofheat;
Itstickstogetherintobeadsordrops;
Itspartofeverylivingorganismontheplanet;etc.
AskstudentsthenamesofOceansandContinents:ThePacificOcean,theAtlanticOcean,theIndiaOcean,theArcticOcean;Asia,Africa,Europe,theNorthAmerica,theSouthAmerica,Antarctica,Oceania
Step2.Warmingup
Usethewater,theoilandtheglasstodothreeexperiments.Learnmoreaboutwater’spropertiesbydoingsomesimpleexperimentsandlearntodescribeanexperiment.
Whatpropertyofwaterdoeseachofthefourexperimentsillustrate?
Whatcausesthisphenomenon?
What’sthisphenomenonrelatedto?
①Experiment1showshowairpressurecausesapieceofthickpapertoclingtoanupturnedglassofwater.
②Experiment2illustrateshowsubstanceswithdifferentdensitybehavewhenplacedinthesamecontainer.
③Experiment3isanexampleofhowwaterdissolvessubstancesandobjects.
④Experiment4illustratessomeofthedifferencesbetweensaltwaterandfreshwater.
Step3.Speaking
1.Pre-speaking
1)Doyouagreewiththesaying“Withoutwater,lifewouldnotexist.”?
2)SonotonlyyouandIagreewiththisopinion,butalsotheUnitedNationsholdthesameview.Andthat’swhywehaveWorldWaterDay.
Q:Isthereanyonewhoknowswhenitis?－Mar.22
3)BriefbackgroundinformationaboutWorldWaterDay:WorldDayforWaterisestablishedbytheUnitedNationsGeneralAssemblysresolution47/193of22December1992.Itisauniqueoccasiontoremindeverybodythatconcreteeffortstoprovidecleandrinkingwaterandincreaseawarenessworld-wideoftheproblemsandofthesolutions,canhelpmakethedifference.
4)Lastyearwewitnessedsomegreatdisasterssuchasthetyphoon“Yunna”andthetsunamiintheIndiaOcean.WhatacoincidencethatthethemeforWorldWaterDay2004was“WaterandDisaster”.WorldWaterDay2005willbeguidedbytheupcomingwaterdecadestheme"WaterforLife".ItwillbethestartingdayforthisInternationalDecadeforAction,"WaterforLife".
2.While-speaking
1)Tosomeextent,theexistenceofWorldWaterDayalsoimpliesthathumanbeingscannotlivewithoutwater.Why?Canyoutellhowwaterisbeingusedinourlife?Givesomeexamples.
－Electricity,agriculture,homeuse,industry,transport,entertainment,etc.
2)Lookatthefirstpicture(“electricity”)inthetextbookandtalkaboutit.
Thewaterisbeingusedtogenerateelectricity.Buildingupbehindahighdam,wateraccumulatespotentialenergy(勢能).Thisistransformedintomechanicalenergywhenthewaterrushesdown.Itisagoodwaytousewaterbecausewaterisrenewablegreenenergy.Itwillneverrunoutifonlyweuseitproperlyandgeneratingelectricitybyusingwaterisabetterwaytoprotecttheenvironmentthanothers.However,ittakesagreatsumofmoneyandalongperiodoftimetobuildadamandpreparealltherequiredequipment.Sincenowadayselectricityhasalreadybeenanindispensablepartofourlife,mostpeoplebenefitfromusingwaterinthisway.
3)Groupwork.Dividestudentsintoseveralgroupswithsixineach.Eachonetakeschargeofonepicture.
Whendiscussingeachpicture,pleasethinkaboutthefollowingquestions:
Howiswaterbeingused?
Whatpropertyofwaterenablesittobeusedinthisway?
Whydoweusewaterinthisway?
Whobenefitsfromusingwaterinthisway?
Isthisagoodwaytousewater?
Whataresomedisadvantagesofusingwaterinthisway?
4)Pairwork.Eachsix-membergroupcanbedividedintothreesmalleroneswithtwoineach.Makeadialogueonthebasisoftheresultsaboutyourtopicswereach,usingfollowingusefulexpressions:
Thewaterisbeingusedto/for…Weshould/could…
Whatwillwedoif…?Ifwe…,wecan…
Itwouldbebetterto…Canyouthinkofabetterway
Step4.Homework:
Recitethenewwordsandexpressionsinthisunit.

Period2Listening
TeachingAimsandDemands:
ListentothetapeandimprovetheSs’abilitytolistentopoemsandstories.
TeachingDifficultPoint:
Graspthemainideaofthepoembylisteningtothetape...
TeachingAids:
Ataperecorder,theblackboard
TeachingProcedures:
Step1.Pre-listening
GiveaverybriefintroductionofTheRimeoftheAncientMarineranditsauthorSamuelTaylorColeridge.Hererimeisthevariantofrhyme.
Step2.While-listening
Listentothestory(Part1)andfindtheinformationaboutit.(When,where,who,what?)
When:18thcentury?(No,notmentioned)
Where:onaship
Who:sailors/mariners
What:Oneofthesailorskillsabirdthatbringsgoodlucktotheship,bydoingwhichhehasbroughtbadluckanddeathtothesailors.
Listentopart1forthesecondtimeandfinishthefollowingtrueorfalsequestions.
ThispoemwaswrittenbyaBritishpoetSamuelTaylorColeridgeinthe1700s.(T)
Inthepoem,oneofthesailorskillsafishundertheship.(F)
Itisbelievedthattheanimalhekillsisonethatbringsgoodlucktotheship.(T)
Othersailorsaresofrightenedandangrythattheykillthesailor.(F)
Thesailorsareextremelythirstybuttheycan’tdrinkthewaterinthesea,becauseitistoodirty.(F)
Listentopart1forthethirdtimeandanswerthefollowingquestions:
Whotellsthestoryinthepoem?
Whatdoesoneofthesailorsdo?
Whatdoyouthinkwillhappennext?
Whyaretheothersailorsfrightened?
Listentopart2andcompletethefollowingsentences.
Finallytheydecidethathemustdie－_______themarinerwho_______thebird.
Hemust____________itallandwill______byhavingtotellthestory…
___________ontheship,_________ontheocean,themarinersuffersfrom_______and______.
Hisstory_____,the________marinersays_________andasksthemtolearnfromhis___________.
Keys:1)except,shot;2)livethrough,pay3)Leftalone,drifting,loneliness,fear;4)told,ancient,farewell,sufferings
Listentopart2againandanswerthefollowingquestions:
Whathappenstothesailors?
Whathappenstothemariner?
Whyisthepersontellingthestory?
Whoisthepersonactually?
Step3.Post-listening
Reflection:Whatdoyoulearnfromthisstory?
－Everythingexistingintheworldhastheirowncertainvalues,weshouldunderstandandrespectthem.
Creation
Workwithpartnerandtrytocomeupwithagood,scarystoryliketheoneaboutthemariner.
Step4.Homework
Thinkasmanyexamplesaspossibletoillustratewaterproperties.

Period3Reading
TeachingAimsandDemands:
1.TohelptheSslearnsomelanguageknowledge,patternsandlanguageitemsaswellasscienceknowledge.
2.TodeveloptheSs’abilityofreadingcomprehensionthroughreadingactivities.
3.TohelptheSsunderstandwhywaterissoimportanttousandwhatwecandotoprotectwater.
TeachingDifficultPoint:
1.Understandeachpartofthepassage.
2.TohelpimproveSs’communicativeskillsbyintroducingtheproperuseof“Modalverbs”.
TeachingAids:
Arecorder,someslides
TeachingProcedures:
Step1:Leadin
Asksomequestionstomakestudentsgettoknowsomethingaboutwater.
Step2.FastReading
Ssreadtheboldwordsinthepassageandunderstandthestructureofthepassage.
Howmanypartsarethereinthepassage?
Ssreadandgetthemainideasofeachpart.
Part1(para1):thepropertiesofwater;
Part2(Para2):chemicalstructureofwater---H2O
Part3(Para3):salinity-----thepercentageofsalt.
Part4(Para4):Density
Part5(Para5):heatcapacity
Part6(Para6-7)Oceanmotion
Step3.CarefulReading
Readthepassagecarefullyandanswerthefollowingquestions.
1.Whatarethepropertiesofwater?
Waterispolar.
Waterisliquidatroomtemperature.
Waterhasarelativelyhighfreezingpoint.
Waterhasdensity1,000kg/m3.
Waterhashighheatcapacity.…
2.Whatcauseswatertohavesuchuniqueproperties?
－Itsmoleculeform/chemicalstructure.
3.Whatiswatermoleculelike?
Chemicalstructure:twohydrogenatomsandoneoxygenatom.
Differentpartsofit:aslightlypositiveendandaslightlynegativeend,soitispolar.
Thefunctionofit:itcauseswatertobeabletodissolvebothsolidsandgases,andthat’swhywatercanbreakdownnutrientsquickly.
4.Dopurewaterandsaltwaterhavethesamechemicalstructure?Doespurewaterhavesalinity?
Qs:1)What’ssalinity?
2)Whatissea/saltwater?－Amixtureofpurewater,dissolvedgasesandsolids.
3)Howdoessalinityaffectwater?
4)Howdoesitaffectwater’sweightandfreezingpoint?
－Thehighersalinitywaterhas,theheavierthewateris.
Thehighersalinityis,thelowerthefreezingpointofwateris.
5.Salinityalsohassomethingtodowiththedensityofwater.
Thehighersalinityis,thehigherdensityofwateris.
Qs:1)Whatisdensity?
2)Howisdensitymeasured?
3)Whichisdenser,wateroroil?
4)Whatwillhappenwhenwaterandoilareinthesamecontainer?Whatdoesthisphenomenonillustrate?
－Oilfloatsonwater.Alessdensesubstancefloatsonadensersubstance.
5)Doeswaterinthesameoceanhavethesamedensity?
－No.Denserwatersinksandpusheslessdensewatertothesurface.
6.That’swhytheoceanwaterwillneverstopmoving.Oceanmotion
Qs:1)Whatdoesoceanmotionmean?
2)Howdoesoceanmotionwork?
－Denserwatersinksandpusheslessdensewatertothesurface.
Oceanmotionhelpsmovenutrientsaroundandaddsenergytothemarineecosystems.
3)Whatcausesoceanmotion?
－Changesinsalinityandtemperature.
7.Thetemperatureoftheoceanwateralwayskeepssteady,makingtheoceanasafeandcomfortablehabitat.Doyouknowwhy?
－Waterhasarelativelyhighheatcapacity.
Qs:1)Whatisheatcapacity?
2)What’sthefunctionofheatcapacity?
－Itdetermineshowasubstanceabsorbsandreleasesheat;
Itkeepswatertemperaturesteady;
Itkeepstheearth’stemperaturesteady.
Step4.LanguagePoints
ParagraphOne:
1.rangefrom…to…rangebetween…and…在……和……之間變化
Thereare200boysrangingfrom7to14inage.
Pricesrangedfrom5dollarsto10dollars.
Theshowhadamassiveaudience,rangingfromchildrentograndparents.
rangeover范圍包括
Ourconversationrangedovermanysubjects.
2.alltheway自始至終，一直，一路上
Allthewayback,theytalkedaboutthepersonsandthingsthattheycouldrememberatschool.
Itisverykindofyoutocomeallthewaytoseeme.
Westayedinthegamealltheway.
bytheway順便一題innoway絕不inaway在某種程度上intheway阻礙3.agreatplacetolive不定式短語作后置定語修飾表示地點的名詞時,如果這個不定式中的動詞時不及物動詞,后面必須跟一個介詞。如:aroomtoliveinahometogoto
注意:如果前面的名詞是place時,介詞可以省略
aplacetolive;aplacetogo
ParagraphTwo:
1.unique“獨一無二的;僅有的;唯一的”
Thisisauniqueworkofart.
Itisauniqueopportunityforyoutosucceed..
詞組:uniquetosb./sth.僅與一個人或一個群體或一件事物有關
Youshouldconcernthespecialdifficultiesuniquetoblindpeoplewhenbuildingagym..
2.propertyn.特性,性質(zhì)(c)財產(chǎn)(u)Manyplantshavemedicinal（藥物的）properties.
commonproperty公共財產(chǎn)
Thecarismyproperty.
3.Waterisactuallyquitesimple,butthewaythewatermoleculeisformedgiveswateritsuniqueproperties.
thewaythewatermolecule在這個定語從句中theway的前面省略了that或inwhich
Idon’tunderstandtheway(that/inwhich)heworkedouttheproblem.
4.thatis:在句中有兩個意思和用法
①thatis:whichmean,也可說成:thatistosay“即,就是”
Heisalocalgovernmentadministrator,thatistosayacivilservant.
②thatis:tobespecific“確切地,具體地”
Sheisahousewife–whensheisnotteachingEnglish,thatis..
5.Thenutrientsinwhateverfallsintotheoceanwillquicklybecomeavailabletootherlivingcreatures.
1)a.whatever(=anythingthat)作為連接代詞引導名詞性從句，“無論什么，任何東西，一切事物”，語氣比what強烈。
Whateverisleftoverisyours.Youmustdowhateverisbestforyou.
Whateverbookyouwanttoreadwillbesenttoyouroffice.SheisagainstwhateverIamfondof.
b.whatever還有“不管什么”的意思,=nomatterwhat
Whateverhappens,we’llmeetheretonight.
2)availableadj.可用的，可獲得的，有效的，適宜的
sth.+be+available+to+sb.某物對某人來說是可得的
Theinformationisavailabletoanybody.Theticketisavailabletoyoufor3days.
sb.+be+available+for+sth.某人對…來說是合適的
Heisnotavailableforthejob.Areyouavailableforameetingtomorrow?available:
①=canbeusedorobtainedby(指物)可用的或可得到的”.
Chinesecommoditiesavailableforexportarevaried.
I’msorry,thoseovercoatsarenotavailableinyoursize.
Thatwastheonlyavailableroom.
②=freetobeseenortalkedto(不太常用)(指人)可會見的,可與之交談的
Thelawyerisnotavailablenow.
ParagraphFour:
1.Ifasubstancehasahigherdensity,say5,000kg/m3,itwillnotfloatonwater.
say:supposeasanexampleorapossibility“設想;假定;比方說”
Let’ssaythatyou’reright.
Sayyouhaveanaccident,whowouldlookafteryou?
Letsthatanywriter,sayDickens…
2.takeadvantageofsth./sb.充分利用某人(某物)
Theytookfulladvantageofthehotel’sfacilities.
Hetakesadvantageofherkindnessandborrowmoneytoooften.
Ishouldliketotakeadvantageofthisopportunitytoexpressmythanksforyourhelp.
拓展:havetheadvantageof有…的優(yōu)點toone’sadvantage對某人有利
atadisadvantage處于不利位置toone’sdisadvantage對某人不利
ParagraphFive:
1.thus:adv.“因此;從而;于是”,
后面跟現(xiàn)在分詞短語,充當結(jié)果狀語.分詞短語作結(jié)果狀語一般置于句末，有時前面帶有thus,hence,therefore等副詞，表示一種“可見的”“順理成章”的自然結(jié)果。
Hesoldhisfarm,thusgainingenoughmoneyforhisjourney.
Shestudiedhard,thusgettinghighmarks.
Hewasverytired,thereforefallingsoundasleep.
◇動詞不定式短語也可作結(jié)果狀語，一種意想不到的結(jié)果：
Theyliftedarockonlytodropitontheirownfeet.
3..absorb
1）vt.吸收(水、熱、光、知識、學問等)
Cottonglovesabsorbsweat.
Somanygoodideas!Itistoomuchformetoabsorballatonce.
Hewasutterlyabsorbedinthebook.
2)beabsorbedby被…吞并/為…所吸收
beabsorbedin全神貫注于…，熱衷于IwasabsorbedinabookandIdidn’thearyourcall.
absorbone’sattention=attractone’sattention
4.giveoff（aliquid,gas,smokeorsmell）散發(fā)，放出
Theflowersgiveoffadelicioussmell.
giveaway泄露，分發(fā)giveup放棄，屈服
giveout1.發(fā)出聲、光、熱、信號2.分發(fā)報紙、書本等3.筋疲力盡
ParagraphFive:
1.sensitive
1)adj.敏感的(to)；靈敏的容易生氣的(about)
Sheissensitivetothesmellofsmoking.Thechildissensitivetoeggs.
Heissensitiveabouthisfailure.
2)（反）insensitive不敏感的（同）reactive有反應的
3)sensible明智的，通情達理的；察覺到的
Evensensiblemendoabsurdthings.Hewasfullysensibleofhisownshortcoming.
senseless失去知覺的；無意義的，不明智的
Hewasbeatensenseless.
拓展sensible明智的，合理的，切合實際的
Ithinkyoumadeasensiblesuggestionatthemeeting.
Step5.Homework
1.Reviewthetext.
2.Recitethelanguagepoints.

Period4IntergratingSkills
TeachingAimsandDemands:
1.Learnandmasterthefollowingnewwords:
budget,rate,visa,arrangement,passport,cheque,currency,sight,seasoned,accommodation
2.Trainthestudents’integratingskills,especiallyreadingandwritingskills.
3.Getthestudentstolearnhowtomakeaplanforatravel.
TeachingImportantPoints:
1.Getthestudentstounderstandthetextexactly,especiallythefollowingwordsandphrases:
rate,makeone’sownarrangements,seasoned,travellight,sights
2.Helpthestudentswriteatravelbrochurewell.
TeachingDifficultPoint:
Howtohelpthestudentsmasterthewaysofwritingabetterdescriptiveessay/paragraph.
TeachingMethods:
1.Asking-and-answeringactivitytocheckthestudents’understandingofthetext.
2.Inductiveandimitativemethodstotrainthestudents’writingability.
3.Individual,pairorgroupworktofinisheachtask.
TeachingAids:1.themultimedia2.theblackboard
TeachingProcedures:
Step1.Lead-in
LookatthemapofChina,answerthesequestions:
Canyounamethethreecitiesmarkedonthemap?Wherearethey?(Chongqing,Shanghai,Dalian)I
Howmuchdoyouknowaboutthem?Istheeconomytherewell-developedornot?
Whichcityisthemostdeveloped?Why?
Nowlet’slookatthismapandthenanswerthefollowingquestions:
Canyoutellwhatmapitis?Whereisit?
Isthewaterheresaltyorfresh?
What’stheplacecalledwhereriverandtheoceanmeet?
Step2.While-reading
1.Skimming
1).Findoutthedefinitionofestuary.
(Anestuaryisthebodyofwaterwherearivermeetstheocean.Saltwaterfromtheoceanandfreshwaterfromtherivermixtogetherinanestuary.Thismixingoffreshandsaltwatercreatesauniqueenvironmentfilledwithlifeofallkinds----azonebetweenthelandandsea.)
2).Whatfunctionsofestuarieshavebeenmentionedinthepassage?
(Greatplacesfornature’syounganimalscleanourwaterbyabsorbingnutrientsandpollutantsfromwatercomingfrominlandsources;providebothrecreationandeducationforhumanbeings.)
3).Textanalysis:AskSstomakeananalysisofthemainreadingtext—Nature’sNursery:Estuaries
Checktheanswers:
Part1.Estuaryisourplanet’snursery
Part2.Estuariesaregreatplacesfornature’syoungcreatures
Part3.Theyhelpcleanourwater.
Part4.Theyproviderecreationandeducationforhumanbeings.
AskSstomakeananalysisofthemainreadingtext—LifeInTheOcean
2.Scanthepassageandanswerthefollowingquestions.
1).Whyareestuariessuchgoodplacesfornature’syoungones?
(Inestuaries,animalscanenjoyallthebenefitsoftheoceanswithouthavingtofacemanyofitsdangers.Tidesprovideenergyfortheecosystems,butestuariesareprotectedfromwavesandstormsbyislands,mudorsand.Nutrientsfromboththelandandtheoceanarriveinestuaries.)
2).Whatdoes“density”meaninthispassage?
(Itmeansthedegreetowhichanareaisfilledwiththingsorpeople.)
3).Howdoestuariesaffectthewaterthatpassesthroughthem?
(Theyabsorbnutrientsandpollutantsfromwatercominginlandsources,thuscleaningourwater.)
4).Whyareestuariesmoresensitivetopollutionthanotherareas?
(Becauseestuariesactasfilters(過濾器),manypollutantsendupinthem.)
5).Whyareestuariesimportanttohumanbeings?
(Estuariesprovidebothrecreationandeducationforhumanbeings.Forexample,peoplecanfish,swimandhavefunonthebeach;scientistsandstudentshaveendlessopportunitiestostudyavarietyoflifeinthehabitat.Estuariesalsocontributetotheeconomythroughtourismandfishing.)
Step3.LanguagePoints
ParagraphTwo
1.benefit
1)vt.“對…有利”,后面接名詞代詞,但不接反身代詞
Exercisebenefitourhealth.
Youradvicebenefitedmeagreatdeal..
Thefreshairwillbenefityou.
2)vi.“獲益,得益于”,后面可接from/by
Webenefitby/fromdailyexercises.
Theplantsbenefitedfromtherain.
3)n.益處,好處(可數(shù)不可數(shù))
Itoldthemallthebenefitsoffreshairandexercise.
Hegotalotofbenefitfromtheholiday.
Youradvicewasofgreatbenefittome.+
4)forthebenefitof為了…的利益beofbenefittosb.對…有好處
2.比較級+than+anyother+n./alltheother+n(pl)./anyone(anybody)else=最高級
Heistallerthananyotherstudentinhisclass.
Heistallerthanalltheotherstudentsinhisclass.
Heistallerthananyoneelseinhisclass.
Heisthetallestinhisclass.
ParagraphFour
1.varyV.變化variousadj.各種不同的
varietyn變化，多樣性avarietyof種類繁多的
Thegirlscomefromavarietyofdifferentbackgrounds.
Thereareavarietyofpatternsforyoutochoosefrom.
2.Estuariesalsocontributetotheeconomythroughtourismandfishing.
contribute:v捐助,捐贈,貢獻;撰稿,投稿
Everyoneshouldcontributewhatsheorhecanafford.
Hisworkhascontributedtoourunderstandingofthisdifficultsubject.
contributesthto投稿
Shehascontributedseveralpoemstoliterarymagazines.
contributeto增加某事物,添加到某事物中;促進某事物
Herworkhascontributedgreatlytoourunderstandingofthisdifficultsubject.
Thechairmanencourageseveryonetocontributetothediscussion.
Step4.ListeningandReadingAloud
T:Verygood.You’veunderstoodthetextexactly.Now,I’llplaythetapeforyou.First,listenandrepeat,payingattentiontothepronunciationandintonation.Thenreaditaloudforawhile.
Step5.Writing
Doyoustillrememberwhatwelearnaboutthepropertiesofwater?Inthatpassage,thewriterintroducesthechemicalstructureandseveralpropertiesofwatertous,suchassalinity,density,heatcapacity.Sofromthisweknowwhenweareexplainingwhatsomethingisorhowthingshappen,itisimportantthatourexplanationsshouldbewellorganizedandeasytounderstand.
Tipone
Ifwearedescribingaprocess，we’dbetterexplaineachstepintheorderithappens.Tellthereadersaboutthecausesandeffectsandusewordslikefirst,second,then,etctoshowtheorderofthesteps.
First…Second…Third/Then…Last…
Tiptwo
Ifwearewritingaboutsomethingthathasseveralparts,weshoulddescribeeachpartandexplainitsfunctionandstructure.
Thefollowingquestionsmayhelp:
Whatisit?Howmanypartsisitmadeupof?
What’sthestructureofeachpart?Howdoesitwork?
Step5.Homework
Imaginethatyourscienceteacheraskyoutoexplainoneofthefollowingquestions:
Whydoesanicecubefloat?
Whatwillhappentoapieceofmetalifyouputitinwater?
Whydosomanyspeciesliveinestuaries?
Whyhavesomanycitiesbeenbuiltbyestuaries?
Chooseoneofthequestionsandwriteapassage,usingwhatyouknowaboutnatureandscienceandwhatyouhavelearnedfromthisunit.

Period5Grammar:ModalVerbs
TeachingAimsandDemands:
ToreviewModalVerbs(toenabletheSstograspsomeimportantModalVerbsandsomeimportantusagesofthem.)
TeachingDifficultPoints:
1.tograspthedifferencesamongsomeModalVerbs
2.tolearnhowtousethem.
TeachingAids:
Someworksheetsandsomeslides.
TeachingProcedures:
Step1.Checktheanswerstoexercise1onP21.
Step2.ReviewModalVerbs.
1情態(tài)動詞的語法特征
1）情態(tài)動詞不能表示正在發(fā)生或已經(jīng)發(fā)生的事情，只表示期待或估計某事的發(fā)生。
2）情態(tài)動詞除ought和have外，后面只能接不帶to的不定式。
3）情態(tài)動詞沒有人稱，數(shù)的變化，即情態(tài)動詞第三人稱單數(shù)不加-s。
4）情態(tài)動詞沒有非謂語形式，即沒有不定式，分詞，等形式。
2比較can和beableto
1）can/could表示能力；可能（過去時用could）,只用于現(xiàn)在式和過去式（could）。beableto可以用于各種時態(tài)。例如：
Theywillbeabletotellyouthenewssoon.他很快就能告訴你消息了。
2）只用beableto的情況：
a.位于助動詞后。b.情態(tài)動詞后。c.表示過去某時刻動作時。d.用于句首表示條件。
e.表示成功地做了某事時，用was/wereableto，不能用could。例如：
HewasabletofleeEuropebeforethewarbrokeout.=HemanagedtofleeEuropebeforethewarbrokeout.
注意：could有時不表示時態(tài)
1）提出委婉的請求，（注意在回答中不可用could）。例如：
---CouldIhavethetelevisionon?我能看電視嗎？
---Yes,youcan./No,youcant.可以/不可以。
2）在否定句、疑問句中表示推測或懷疑。例如：
Hecouldntbeabadman.他不大可能是壞人?！?br> 3比較may和might
1）表示允許或請求；表示沒有把握的推測；may放在句首，表示祝愿。例如：
MayGodblessyou!愿上帝保佑你！
Hemightbeathome.他可能在家。
注意：might表示推測時，不表示時態(tài)，只是可能性比may小。
2）成語：may/mightaswell，后面接不帶to的不定式，意為"不妨"。例如：
Ifthatisthecase,wemayaswelltry.如果情況確實如此，我們不妨試一試。
典型例題
Peter___comewithustonight,butheisntverysureyet.
A.mustB.mayC.canD.will
答案B.表可能性只能用may。此句意可從后半句推出。
4比較haveto和must
1）兩詞都是必須的意思，haveto表示客觀的需要，must表示說話人主觀上的看法，既主觀上的必要。例如：
Mybrotherwasveryill,soIhadtocallthedoctorinthemiddleofthenight.　
弟弟病得很厲害，我只得半夜里把醫(yī)生請來。（客觀上需要做這件事）
Hesaidthattheymustworkhard.他說他們必須努力工作。（主觀上要做這件事）
2）haveto有人稱、數(shù)、時態(tài)的變化，而must只有一種形式。但must可用于間接引語中表示過去的必要或義務。例如：
Hehadtolookafterhissisteryesterday.他昨晚只得照顧他姐姐。
3）否定結(jié)構(gòu)中：donthaveto表示"不必"，mustnt表示"禁止"。例如：
Youdonthavetotellhimaboutit.你不一定要把此事告訴他。
Youmustnttellhimaboutit.你不得把這件事告訴他。
5must表示推測
1）must用在肯定句中表示較有把握的推測，意為"一定"。
2）must表對現(xiàn)在的狀態(tài)或現(xiàn)在正發(fā)生的事情的推測時，must后面通常接系動詞be的原形或行為動詞的進行式。例如：
Youhaveworkedhardallday.Youmustbetired.你辛苦干一整天，一定累了。（對現(xiàn)在情況的推測判斷）
Hemustbeworkinginhisoffice.他一定在辦公室工作呢。
比較：Hemustbestayingthere.他現(xiàn)在肯定在那里。
Hemuststaythere.他必須呆在那。
3）must表示對已發(fā)生的事情的推測時，must要接完成式。例如：
Ididnthearthephone.Imusthavebeenasleep.我剛才沒有聽到電話，我想必是睡著了。
4）must表示對過去某時正發(fā)生的事情的推測，must后面要接不定式的完成進行式。例如：
---Whydidntyouanswermyphonecall?為何不接我的電話？
---Well,Imusthavebeensleeping,soIdidnthearit.唉，肯定在睡覺，所以沒有聽見。
5）否定推測用cant。例如：
IfTomdidntleavehereuntilfiveoclock,hecantbehomeyet.
6表示推測的用法
can,could,may,might,must皆可表示推測，其用法如下：
1）情態(tài)動詞+動詞原形，表示對現(xiàn)在或?qū)淼那闆r的推測，此時動詞通常為系動詞。例如：
Idontknowwheresheis,shemaybeinWuhan.我不知道她在哪兒，可能在武漢。
2）情態(tài)動詞+動詞現(xiàn)在進行時，表示對現(xiàn)在或?qū)碚谶M行的情況進行推測。例如：
Atthismoment,ourteachermustbecorrectingourexampapers.這時，想必我們老師正在批改試卷。
3）情態(tài)動詞+動詞完成時，表示對過去情況的推測。例如：
Theroadiswet.Itmusthaverainedlastnight.地是濕的，昨天晚上一定下雨了。
4）情態(tài)動詞+動詞的現(xiàn)在完成進行時，表示對過去正在發(fā)生事情的推測。例如：
Yourmothermusthavebeenlookingforyou.你媽媽一定一直在找你。
5）推測的否定形式，疑問形式用cant,couldnt表示。例如：
Mikecanthavefoundhiscar,forhecametoworkbybusthismorning.
邁克一定還沒有找回他的車，因為早上他是坐公共汽車來上班的。
注意：could,might表示推測時不表示時態(tài)，其推測的程度不如can,may。
7情態(tài)動詞+have+過去分詞
1）may（might）have+donesth,can（could）have+donesth表示過去，推測過去時間里可能發(fā)生的事情。例如：
Philipmay（might）havebeenhurtseriouslyinthecaraccident.菲力浦可能在車禍中受了重傷。
Philipcan（could）havebeenhurtseriouslyinthecaraccident.
2）musthave+donesth，對過去時間里可能發(fā)生的事情的推測，語氣較強，具有"肯定"，
"諒必"的意思。例如：
---Lindahasgonetowork,butherbicycleisstillhere.琳達已經(jīng)去上班了，但她的單車還在這兒。
---Shemusthavegonebybus.肯定乘巴士去的。
3）oughttohavedonesth,shouldhavedonesth表示本應該做某事，而事實上并沒有做。否定句表示"不該做某事而做了"。例如：
Yououghtto（should）havebeenmorecarefulinthisexperiment.你當時在做試驗時應該更仔細點。
Heoughtnottohavethrowntheoldclothesaway.他不該把舊衣服扔了。（事實上已扔了。）
oughtto在語氣上比should要強。
4）neednthavedonesth表示本沒必要做某事，但做了。例如：
Idressedverywarmlyforthetrip,butIneednthavedoneso.Theweatherwashot.
旅行時，我衣服穿得較多，其實沒有必要。那時天很熱。
5）wouldliketohavedonesth表示本打算做某事，但沒做。例如：　
Iwouldliketohavereadthearticle,butIwasverybusythen.我想讀這篇文章，但太忙了一直沒讀。
8.should和oughtto
除了上述的用法，兩者還可表示"想必一定，按理應該"的意思。例如：
Ioughttobeabletoliveonmysalary.靠我的薪水，想必也能維持了。
Itoughttobereadynow.想必現(xiàn)在準備好了吧。
Theyshouldbetherebynow,Ithink.現(xiàn)在他們該到那兒了。
Thepoemsshouldbeoutinamonthatmost.詩集估計最多還有一個月就要出版了。
9hadbetter表示"最好"，相當于一個助動詞，它只有一種形式，它后面要跟動詞原形。例如：
Itisprettycold.Youdbetterputonmycoat.天相當冷。你最好穿上我的外套。
Shedbetternotplaywiththedog.她最好不要玩耍那條狗。
hadbetterhavedonesth表示與事實相反的結(jié)果，意為"本來最好"。例如：
Youhadbetterhavecomeearlier.你本該來得早一點。
10wouldrather表示"寧愿"
wouldratherdo
wouldrathernotdo
wouldrather…than…寧愿…而不愿。
還有wouldsooner,hadrather,hadsooner都表示"寧愿"、"寧可"的意思。例如：
IfIhaveachoice,Ihadsoonernotcontinuemystudiesatthisschool.
Iwouldratherstayherethangohome.=Iwouldstayhereratherthangohome.
典型例題
----Shallwegoskatingorstayathome?
----Which___do?
A.doyouratherB.wouldyouratherC.willyouratherD.shouldyourather
答案B。本題考查情態(tài)動詞rather的用法，wouldrather+dosth意為"寧愿"，本題為疑問句，would提前，所以選B。
11will和would
注意：1）wouldlike；wouldliketodo=wantto想要，為固定搭配。例如：
Wouldyouliketogowithme?想和我一塊去嗎？
2）Willyou…?　Wouldyoulike…?表示肯定含義的請求勸說時，疑問句中一般用some,而不是any。例如：
Wouldyoulikesomecake?吃點蛋糕吧。
3）否定結(jié)構(gòu)中用will，一般不用would,wontyou是一種委婉語氣。
Wontyousitdown?你不坐下嗎？
12情態(tài)動詞的回答方式
問句肯定回答否定回答
Needyou…?Yes,Imust.No,Ineednt
Mustyou…?No,Idonthaveto.
典型例題
1）---CouldIborrowyourdictionary?
---Yes,ofcourse,you____.
A.mightB.willC.canD.should
答案C.could表示委婉的語氣，并不為時態(tài)。答語中ofcourse，表示肯定的語氣，允許某人做某事時，用can和may來表達，不能用could或might。will與you連用，用來提出要求或下命令。should與you連用，用來提出勸告。
2）---ShallItellJohnaboutit?
---No,you___.Ivetoldhimalready.
A.needntB.wouldntC.mustntD.shouldnt
答案A。neednt不必，不用。wouldnt將不,不會的。mustnt禁止、不能。shouldnt　不應該。本題為不需要，不必的意思，應用neednt。
3）---Dontforgettocometomybirthdaypartytomorrow.
---______.
A.IdontB.IwontC.IcantD.Ihavent
答案B.will既可當作情態(tài)動詞，表請求、建議、也可作為實義動詞表"意愿、意志、決心"，本題表示決心，選B。
13帶to的情態(tài)動詞
帶to的情態(tài)動詞有四個：oughtto,haveto,usedto,beto,如加上havegotto（=must）,beableto，為六個。它們的疑問、否定形式應予以注意：
Dotheyhavetopaytheirbillbeforetheendofthemonth?
Shedidntusetoplaytennisbeforeshewasfourteen.
Yououghtnottohavetoldherallaboutit.
Oughthetoseeaheartspecialistatonce.?
oughtto本身作為情態(tài)動詞使用。其他的詞作為實義動詞使用，變疑問，否定時，須有do等助動詞協(xié)助。
典型例題
Tomoughtnotto___meyoursecret,buthemeantnoharm.
A.havetoldB.tellC.betellingD.havingtold
答案A。由于后句為過去時，告訴秘密的動作又發(fā)生在其前因，此地應用過去完成時，但它在情態(tài)動詞oughtto后，所以用havetold。
14比較need和dare
這兩詞既可做實義動詞用，又可做情態(tài)動詞用。作為情態(tài)動詞，兩者都只能用于疑問句，否定句和條件句。need作實義動詞時后面的不定式必須帶to，而dare作實義動詞用時,后面的to時?？梢员皇÷?。
1）實義動詞：need（需要,要求）need+n./todosth
2）情態(tài)動詞：need，只用原形need后加do，否定形式為neednot。例如：
Needyougoyet?你要走了嗎？
Yes,Imust./No,Ineednt.是的，我要走了/不，不急著走。
Step3.Exercises
Step4.Homework[工作總結(jié)之家 dG15.cOM]

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Unit13Thewaterplanet知識點總復習教案

高考英語備考單元知識搜索與探究歸納Unit13Thewaterplanet

經(jīng)驗告訴我們，成功是留給有準備的人。作為高中教師就要早早地準備好適合的教案課件。教案可以保證學生們在上課時能夠更好的聽課，幫助高中教師能夠井然有序的進行教學。優(yōu)秀有創(chuàng)意的高中教案要怎樣寫呢？下面是小編精心為您整理的“高考英語備考單元知識搜索與探究歸納Unit13Thewaterplanet”，歡迎閱讀，希望您能閱讀并收藏。

高二英語Unit13Thewaterplanet知識點總復習教案

高二英語Unit13Thewaterplanet知識點總復習教案
SectionI課前準備、聽力、口語
1.Practisemakingsuggestionsandexpressingopinions.練習提出建議并發(fā)表觀點。(p.17Goals2)
▲practisevt.練習
practise后面的動詞一般要用-ing形式。類似practise這種接動詞-ing形式作賓語的動詞還有：finish,enjoy,mind,giveup,canthelp,suggest,keep等。如：①Ipractiseplayingthepianoeveryday.我每天練習彈鋼琴。②ShehadfinishedwritingtheletterwhenIwentin.我進去時她已寫完信了。③Heenjoysskatingverymuch.他非常喜歡溜冰。④Doyoumindclosingthewindow?請你把窗
戶關上好嗎?⑤MarycouldnthelplaughingatTomsjoke.對于Tom的玩笑，Mary忍不住笑了。
拓展：practicen.inpractice實際上putsth.intopractice將…付諸實施
2.Filloneglasswithfreshwaterandanotherglasswithsaltwater.在一個玻璃杯里裝滿淡水另一個玻璃杯里裝滿鹽水。(p.17WarmingupNo.4)
▲fill的用法(1)使?jié)M；填滿Hefilledthebathwithwater.他把浴缸裝滿水。(2)占有(地位)，任(職位)Thepositionoftheprincipalisnotyetfilled.校長的職位還空著。(3)供應(需求)①Hisanswerdidnotfillourneed.他的回答無法滿足我們的要求。②Fillinyourtelephonenumber.請?zhí)顚懩愕碾娫捥柎a。③Theroomwasfilledwithlaughter.房間里充滿了笑聲。④Ihavefilledupthebottle.我把瓶子裝滿了。
▲拓展：fillin填寫(事項，表格等)fill...with...把……裝滿befilledwith=befullof充滿fillup裝滿；填寫(=fillin)
3.Whatcanwedotoprotectthewateronourplanet?我們能做些什么來保護我們這個星球上的水呢？(p.17倒數(shù)第1行)
▲protect保護，防御常與介詞against(from)連用，譯為“保護……免遭”。①Heiswearingsunglassestoprotecthiseyesfromthestrongsunlight.他戴著太陽鏡以擋強烈的陽光。②Theheavyrainkeptusfromgoingout.大雨使我們無法出去。
▲注意：stop(prevent)…fromdoing中from可省去；keep…fromdoing中from不可省。
▲拓展：keep…from...阻止(妨礙)…做…=stop…(from)…=prevent…from...
4.Whotellsthestoryinthepoem?誰講了這首詩里的故事？(p.18Part1No.1)
▲tell的重要句型歸納
(1)tell+n.(人)+n.=tell+n.+to+n.(人)Didyoutellyourparentsthenews?=Didyoutellthenewstoyourparents?你把這消息告訴你父母了嗎?
(2)tell+n.(人)+(that)／wh...①Hetoldme(that)hewouldbebackinanhour.他告訴我，一個小時內(nèi)他就回來。②Hetoldherwhathadhappened.他告訴她發(fā)生了什么事。
(3)tell+n.(人)+of(about)Hetoldmeof(about)hisworries.他告訴我他的煩惱。
▲拓展：
tell+n.+from+n.辨別……和……alltold總共
Donttellme!不至于吧!I(can)tellyou.的確，真的
Thereisnotelling.不得而知；很難說。
totellthetruth老實說
①Itssometimeshardtotellonetwinfromtheother.雙胞胎有時很難分辨。②Alltold,therewere350peoplekilledintheplanecrash.那次墜機事件中總共有350人喪生。③Donttellmeyouaregoingbacktoyourhometown.你不至于要回到你的故鄉(xiāng)吧。④Itsawonderfulinvention,I(can)tellyou.那的確是個了不起的發(fā)明。⑤Thereisnotellingwhereheis.無法知道他到底在哪里。
5.Workwithyourpartnerandseewhetheryoucancomeupwithagood,scarystory…跟你的同伴一同看看是否能想出一個好的，引起驚慌的故事…(p.18ListeningPart2No.4)comeupwith的用法
▲comeupwith在本單元中作“提出”“想出”解。如：①Theyoungengineercameupwithanewdesign.那個年輕工程師提出一種新的設計方案。②Themagazinerecentlycameupwithsomeadviceonsmoking.該雜志最近就吸煙問題提出一些忠告。③Youvecomeupwithagoodidea.你想出的主意好極了。④Scientistswillhavetocomeupwithnewmethodsofincreasingtheworldsfoodsupply.科學家們必須找出增加全世界食品供應的新方法。
▲comeupwith有“拿出…”“籌措錢”之意。如：①IfWathscancomeupwithmillion,wellgotoLondon.如果瓦茨能夠拿出一千五百萬美元，我們就去倫敦。②Youhavenochoicebutt0comeupwith￡18,000.你別無選擇，必須拿出一萬八千英鎊。
▲comeupwith亦可作“趕上”解。如：①Letshurryupsothatwemaycomeupwiththem.咱們快些走，以便趕上他們。②Weshallhavetoworkhardsoastocomeupwiththeotherfirm.我們得努力工作才能趕上另一家商行。
6.Whobenefitsfromusingwaterinthisway.以這種方法用水誰受益了?(p.18Speaking第5點)
▲benefit的用法
(1)n.利益；益處Igetalotofbenefitfromlearningaforeignlanguage.從學習外語中我得到許多益處。
▲注意：以下兩個短語：beofbenefitto對……有裨益；forthebenefitof為了……(的利益)。①Thatexperiencewasofgreatbenefittome.那個經(jīng)驗對我很有益處。②Wemustmakeeffortstotakeexerciseforthebenefitofourhealth.為了健康我們必須努力鍛煉身體。
(2)vi.有益于①Suchfoolishbehaviourwillnotbenefityourease.這樣愚蠢的行為將無益于你的案子。②Ibenefitedenormouslyfrommyfathersadvice.我從父親的忠告中獲益良多。
benefit可作為及物動詞用，意為“有益于”。如：①Thetradeagreementwillgreatlybenefitthedevelopingcountries.貿(mào)易會談將大大的有益于發(fā)展中國家。②Thenewrailwaywillbenefitthedistrict.這條新鐵路將會給這個地區(qū)帶來好處。③Thelongrestbenefitedher.長期休息對她有好處。
▲benefitfrom／by的用法:benefitfrom／by意為“從……中得益”“得益于……”。如：①Wecanallbenefitfromhisknowledge.我們均可得益于他的知識。②Youbenefitfromwhathetoldyouintheletter.你會從他的信中受益。

高考英語Units13～14　Thewaterplanet知識點復習教案