Unit4SectionA2a3d课件人教版英语八年级下册-1

UNIT4TheWondersofNatureSectionA2a-3d1.Fendouzhereached______________.2.Thedeepseabeginsat______________.3.TheTitanicrestsat____________.4.Awhalecandiveto_________________.2aWhatdoyouknowaboutthedeepsea?Completethesentenceswiththeinformationfromthepicture.潜水10,909metres200metres3,800metresover2,000metres2bAclassisaskingadeep-searesearchersomequestionsafterhistalk.Listenandtickthetopicstheydiscuss.□Where

the

deep

sea

begins□Why

people

are

researching

the

deep

sea□WhichChinesesubmersiblediveddeeperinthewaterthanmanyothers□Whatdeep-seaanimalsarelike□Howeveryoneshouldprotectthedeepsea潜水艇2cListenagain.Completethesentenceswiththefactsfromtheconversation.1.

People

still

don't

know

much

about

the

.2.

In

,

China's

Fendouzhe

dived

into

the

deep

sea

andfilmed

it.3.

Some

animals

have

unusual

abilities.

Some

are

,but

can

“sea”.

Some

can

even

createtheirown

.4.

There

is

rubbish

even

at

metres

deep.2020ocean

floorblind

light11,0002dReadthequestionsandthinkofmoreyouwouldliketoaskthedeep-searesearcher.Researchtheanswers.Thenaskandanswerthequestionswithapartner.What

is

the

largest

shark

in

the

deep

sea?What

is

the

bottom

of

the

deep

sea

like?Why

is

itimportanttoresearchthe

deep

sea?在……的底部Readtheconversationandanswerthequestions.1.WhatwaterfalldoYamingandEllamention?2.WhyistheYellowRivercalled"yellow"?3.Whyareriversimportant?TheHukouWaterfall.Becausesomepartsoftherivercarrybrownandyellowearth.BecauseRivershelpedancientcivilizationstodevelop.Exploration3a

3bWhatdoYamingandEllaknowabouttheserivers?Completetheinformationaboutthethreerivers.RiverCountryLengthFeatureYellowRiverChina_____kmthesecondlongestriverin______YangtzeRiver____________kmthe_______riverinChinaNileRiver____________kmthelongestriverin_______ChinaAfrica5,4646,3006,671ChinalongestAfricaBoththeYellowRiverandtheNileRiverhelpedinthedevelopmentofancient___________.civilizationsExplorationTranslatethekeyexpressions最长的河流流经的距离最远……公里长第二长

“the+序数词+最高级”表示“第……最……的”……和……（两者）都古代文明callsb./sth....把某人/物叫做……顺便说一下了解/学习……无论如何ExplanationYaming:

Welcomeback,Ella!Howwasyourtrip?Ella:Itwasgreat!WesawtheHukouWaterfallontheYellowRiver.IsthatthelongestriverinChina?Yaming:No,theYangtzeRiveristhelongestriverinChina.Ittravelsthefarthestandisabout6,300kilometreslong.TheYellowRiveris5,464kilometreslongandis

thesecondlongest.Bytheway,doyouknowwhyit'scalledtheYellowRiver?Ella:Becauseit'syellow?Yaming:Right.Somepartsoftherivercarrybrownandyellowearth.欢迎回来你的旅行怎么样？中国最长的河流流经距离最远第二长的顺便问一下

doyouknowwhy...?你知道为什么……吗？携带棕黄色的泥土Ella:That'sinteresting!Ilikelearningaboutrivers.MyfavouriteistheNile.Didyouknowit'sthelongestriverintheworld?Yaming:Yes,it's6,671kilometreslong.It'sveryimportantinEgypt'shistory.Ella:That'sright.BoththeNileandtheYellowRiverhelpedancientcivilizationsto

develop.Andthey'restillveryimportanttoday.Yaming:Yes.InChina,weevencalltheYellowRiverour"motherriver"!Ella:Weshouldprotectthematallcosts.世界上最长的河流在埃及历史上bothAandB……和……两者都古代文明help...todevelop帮助…发展call...our"motherriver"把……称作我们的“母亲河”protect...atallcosts不惜一切代价保护……LanguagePoints1.BoththeNileandtheYellowRiverhelpedancientcivilizationstodevelop.尼罗河和黄河都促进了古代文明的发展。学生们不但在操场上玩，也在教室里玩。Thestudentsplaybothontheplaygroundandintheclassroom.你和她都是学生。Bothyouandshearestudents.(1)both...and...……和……都；既……又……用来连接两个相同的句子成分，所连接的句子成分在句中可作主语、宾语、状语等。当连接两个名词或代词作主语时，谓语动词用复数形式。LanguagePoints1.BoththeNileandtheYellowRiverhelpedancientcivilizationstodevelop.尼罗河和黄河都促进了古代文明的发展。两部电影都很感人。Bothmoviesaremoving.我们俩都更喜欢悦耳的音乐。Bothofusprefersmoothmusic.(2)both（反义词：neither两者都不）①

形容词

两个；双方；两者都后接复数名词。反义词neither意为"两者都不"。②

代词

两个，两个都常用于"bothof+代词"或"bothof+the/其他限定词+可数名词复数"结构中。both在句中作主语时，谓语动词用复数形式。注意:both常位于连系动词be、助动词或情态动词之后，实义动词之前。这俩男孩都来自农村。Bothoftheboysarefromthevillage.LanguagePoints2.Weshouldprotectthematallcosts.我们应用一切办法保护它们。我们必须不惜一切代价保护这些河流。Wemustprotecttheriversatallcosts.我们应该不惜一切代价保证安全。Weshouldkeepsafeatallcosts.atallcosts不惜一切代价,无论如何介词短语,常位于句末,作状语dosthatallcosts不惜一切代价做某事must/should...atallcosts必须/应该不惜一切代价……LanguagePoints3.helpedinthedevelopmentofancientcivilizations促进了古代文明的发展随着他事业的发展，他帮助了更多的人。Withthedevelopmentofhisbusiness,hehelpedmorepeople.父母对他们孩子的成长产生很大影响。Parentsmakeabigdifferencetotheirchildren'sdevelopment.development（不可数名词）

发展；壮大；成长其动词形式为develop(发展；壮大)。thedevelopmentof...……的发展拓展:developed（形容词）

发达的developing（形容词）

发展中的adevelopedcountry发达国家adevelopingcountry发展中国家Ella: CouldyoutellmemoreaboutChina,Yaming?Yaming:Sure!Whatwouldyouliketoknow?Ella: What’sthebiggestdesertinChina?Yaming:It’stheTaklimakanDesert.Ella: Doyouknow...?ImaginethatyouareYamingorElla.ContinuetheconversationwithapartneraboutothergeographicalfeaturesinChina.3dElaborationCouldyoutellmemoreaboutChina,Yaming?Sure!Whatwouldyouliketoknow?What’sthebiggestdesertinChina?It’stheTaklimakanDesert.DoyouknowhowbigtheTaklimakanDesertis?It’sabout337,600squarekilometers.

Arethereanyplantsoranimalsthere?Yes!Therearesomespecialplantsandcamelsthatcanliveinthedryenvironment.Isitdangeroustotravelthere?Sometimes.Thesandstormsarestrong,butit’salsoabeautifulplace.CouldyoutellmemoreaboutChina,Yaming?Sure!Whatwouldyouliketoknow?What’sthelargestlakeinChina?It’sQinghaiLake.It’sabeautifulsaltwaterlakeinQinghaiProvince.DoyouknowhowlargetheQinghaiLakeis?It’sabout4,625squarekilometers.Isitagoodplacetovisit?Yes!Manypeoplegotheretoseetheclearbluewaterandlovelybirds.

Cool!Iwanttovisititoneday.

carry

civilization

atallcosts

partof

far1.Timchosethe____________seatfromthedoor.

2.Tohaveacomfortablelivingenvironment，weshouldprotecttheearth________________.

3.Lastweek，westudieddifferent_____________inhistoryclass.

4.Youhaveto____________aphonesothatwecan