Unit4ProtectingtheEnvironmentGrammarinuse课件高中英语上外版（2020）选择性

《

高

中

英

语

》

(

上

外

版

)选择性必修第三册第四单元Protecting

the

Environment授

课

教

师

：

课时授课内容1Getting

Started/Reading

A2Reading

A/VocabularyFocus3Reading

A/GrammarinUse4Listening,Viewingand

Speaking5ReadingB6CriticalThinking7Writing8FurtherExploration/Self-assessment《

高

中

英

语

》

(

上

外

版

)选择性必修第三册第四单元学习目标

Learning

Objectives：Attheendof

the

lesson,

you

will

be

able

to

...1.能在语篇中识别“Itis/was

…that/who

…

”和do（does/did）这两种强调结构，并能判断其表意功能；recognizeandunderstandinthecontexttheform,meaningand

function

of

emphaticstructures“Itis/was

…that/who

…”and

…do

(does/did)+Verb;2.能在语境中恰当使用上述强调结构传递信息和表达意义，谈论环境问题usetheemphaticstructuresin

thepropercontexttoconveyinformationandexpressmeaning,talking

about

environmental

issues.

What’stheworstchange

forouratmosphere?

Whatdemonstratesthevillainyof

carbondioxide?

Whydoestheauthoruse

thesentence

pattern“It

is

…that

…”?Inthisway,theauthor

canemphasizethesubject“themelting

of

theice

caps”

.IdentifyformsofemphaticstructuresReadtheparagraphandanswerthe

questions.l

Itisthemeltingof

theicecapsthat

isthe

worst

change.l

Themeltingof

theicecapsdoes

causetheworst

change.Underlinethesentenceswithemphaticstructuresinthedialogue.A:Iscarbon

dioxideharmful?B:No.Itmakesupaverysmallpercentageof

thegases

intheworld.

In

fact,

carbon

dioxide

is

essentialforlife.Itiscarbondioxidethatplantsneedtoproduce

“food”

.A:In

that

case,the

more

the

better?B:Well,it’snotoftenthecase.Itisdue

to

the

increase

in

the

concentration

of

carbon

dioxide

in

theatmospherethattheplanet’saveragetemperatureisgoingup.Itisthe

greenhouse

effect

that

we

call

it.

A:

So,is

the

earth

getting

hotter?B:Yes.Theincreasedtemperaturedoeschangeourworldfortheworse.

Thepolar

ice

caps

aremelting,

andour

sealevel

is

rising.A:Howcanwe

stopglobalwarming?B:

Allnationsacrosstheworldneedtoworktogether.Itisall

of

uswho

shouldtake

the

challenge.Identifyformsofemphaticstructures

A:

Iscarbondioxide

harmful?B:

No.

It

makes

upaverysmall

percentageofthegases

in

theworld.

Infact,carbondioxide

isessentialforlife.

It

is

carbon

dioxide

that

plants

needto

produce“food”

.A:

In

that

case,the

more

the

better?B:Well,

it’s

not

often

the

case.

It

is

due

to

the

increase

in

theconcentrationofcarbondioxide

intheatmospherethatthe

planet’s

average

temperature

is

going

up.

It

is

the

greenhouse

effect

thatwe

call

it.A:So,

is

the

earth

getting

hotter?B:Yes.The

increasedtemperaturedoeschangeourworldforthe

worse.

The

polaricecapsare

melting,and

our

sea

level

is

rising.A:

Howcanwestop

globalwarming?B:All

nationsacrosstheworld

needtoworktogether.

It

isallof

us

whoshouldtakethe

challenge.

Why

isemphaticstructure

used?

“subject”“complement”“object”“adverbial”“

predicateverb”ToemphasizeStructures①Itis/was+theemphasisedpart+that/who

...②...do

(did/does)

+predicate

verb

...TheemphasisedpartsExamplesentences主语(subject)Itisallof

us

who

shouldtakethe

challenge.宾语(object)Itis

carbon

dioxidethatplantsneedtoproduce“food”

.补语(complement)Itisthegreenhouseeffect

that

we

call

it.状语(adverbial)Well,itisdue

to

the

increase

in

theconcentrationof

carbondioxideinthe

atmosphere

thattheplanet’saverage

temperatureisgoingup.谓语动词(predicateverb)Theincreasedtemperaturedoeschange

our

worldfortheworse.Rewriteeachofthefollowingstatementswiththeemphaticstructure

by

emphasisingtheunderlined

part.1.Plantsabsorbcarbondioxideandconvert

it

into

their

own

tissue.Itisplantsthatabsorbcarbondioxideandconvert

it

intotheir

owntissue.2.Intheprocessplantsreleaseoxygen,whichisnecessaryforhumanand

animal

life.Itisintheprocessthatplantsreleaseoxygen,whichisnecessaryforhuman

andanimal

life.3.Carbondioxideinalarge

quantity

damagesthe

environment.Carbondioxideinalargequantitydoes

damagethe

environment.4.Theearthmaintainsabalancebygainingheatandlosing

it

in

turn.Itisabalancethattheearthmaintainsbygainingheatandlosing

it

in

turn.5.The

concentration

of

carbon

dioxide

will

be

about0.066percent.It

is

about0.066percent

that

the

concentration

of

carbon

dioxide

will

be.Practicetheuseofemphatic

structuresAnswerthefollowingquestionswithemphaticstructuresbyreferring

to

Reading

A.1.What

do

plants

release

after

theyabsorbcarbondioxide?2.Whateffectsof

carbondioxide

on

our

lifemaymakepeopleconsideritthe

villainintheatmosphere?3.What

does

we

call

the

process

whencarbondioxideblockstheearth

from

radiatingheatinto

space?4.Sincewhen,hastheconcentration

of

carbondioxidemovedupwardseach

year?5.Iheardsomeglaciersmeltedbecauseof

globalwarming,didthey?6.Wetakeactiontopreventthegreenhouseeffectfrom

gettingworse,

dowe?Practicetheuseofemphatic

structuresAnswerthefollowingquestionswithemphaticstructuresbyreferring

to

Reading

A.1.What

do

plants

release

after

they

absorb

carbon

dioxide?Itisoxygenthatplantsreleaseaftertheyabsorbcarbon

dioxide.2.Whateffectsof

carbondioxideonourlifemay

makepeople

consideritthevillainintheatmosphere?Itisfarminglandlost,theflooding

of

low-lying

areas

andtherising

sealevelsthatmakepeopleconsidercarbondioxidethevillaininthe

atmosphere.3.What

does

we

call

the

process

when

carbon

dioxide

blocks

theearthfromradiatingheatinto

space?Itisthegreenhouseeffectthatwecalltheprocesswhen

carbon

dioxideblockstheearthfromradiatingheatinto

space.Practicetheuseofemphatic

structuresAnswerthefollowingquestionswithemphaticstructuresbyreferring

to

Reading

A.4.

Sincewhen,hastheconcentrationof

carbondioxidemoved

upwardseachyear?It

is

since

1958,when

the

carbon

dioxide

of

the

atmosphere

firstbegantobemeasuredcarefullythattheconcentrationof

ithasmoved

upwardseachyear.5.I

heard

some

glaciers

melted

because

of

global

warming,did

they?Someglaciersdidmeltbecauseof

globalwarming.6.We

take

action

to

prevent

the

greenhouse

effect

from

getting

worse,

do

we?Wedotakeactiontopreventthegreenhouseeffect

from

getting

worse.Practicetheuseofemphatic

structuresInformationGap

Activity(Textbook

P57.

II)ExampleA:Did

the

concept

of

“heaven-and-humanoneness”comeintoshapeintheHanDynasty?B:No,itwasinthepre-Qinperiodthatitcameinto

shape.Useemphaticstructures

inthe

contextInformationGap

Activity(Textbook

P57.

II)A:WastheconceptintroducedbyConfucius?B:No,itwasMenciusandZhuangziwhointroducedtheconcept.B:WastheconceptfurtherdevelopedbyLiuXie?A:No,itwasbyDongZhongshuthattheconceptwasfurtherdeveloped.B:Wasitagainstthebackgroundof

increasedpopulationinChinaandtheworld

over

that

some

thinkers

are

proposing

a

new

operation

of

heaven-and-humanoneness?A:No,it

was

against

the

back

ground

of

increasedeco-environmentalpressuresin

Chinaandtheworldoverthattheyareproposingthenewoperation.Useemphaticstructures

inthe

contextHaveadiscussionabouttheconceptof“

heaven-and-humanoneness”withthe

exampleofcarbondioxide.

Useemphaticstructureswheneverpossible.You

may

begin

with

…A:Weoften

heartheglobe

is

heating

up.Then,what

leadstoglobalwarming?

B:

…Useemphaticstructures

inthe

contexthumannature

(carbondioxide)heaven-and-

humanonenesshumanactivities

heaven

balanceAlex:Weoften

heartheglobe

is

heating

up.Then,what

leadstoglobalwarming?Bob:

It

isthegreenhouseeffect/thecarbondioxide

ina

large

quantity

that

leads

to

global

warming.Actually,

itgoesagainsttheconceptof“

heaven-and-humanoneness”

.Alex:“

heaven-and-human”?

Is

itthe

balance

between

humanand

naturethattheconcept

emphasizes?B