Unit7SectionB课件英语人教版八年级上册

Section

B

（第三、四课时）1.I

live

in

an

apartment

across

the

street

from

here.

我住在这条街对面的一套公寓里。

across是介词，有“横穿”的意思，“across…from”意为“在……另一边”。例如：

The

bank

is

just

across

the

street.

银行就在街对面。

【辨析】across,

through单词用

法例

句across强调“横穿”，即从某个表面的一边到另一边。Please

don’t

go

across

the

street

when

the

traffic

lights

are

red.

红灯亮时不能横穿马路。through强调从某个立体空间穿过。Don’t

go

through

the

forest

alone.

不要单独一个人在森林里穿行。2.They

are

usually

like

human

servants.它们通常像人类的仆人。

（1）此处like是介词，意为“像”。例如：

She

is

like

her

mother

very

much.

她长得很像她妈妈。

（2）like还可以作动词，意思是“喜欢”。例如：

I

like

reading

this

kind

of

articles

very

much.

我非常喜欢读这类文章。3.…

and

they

do

simple

jobs

over

and

over

again.……并且它们重复做一些简单的工作。（1）simple是形容词，意为“简单的”。例如：CanyoureadanysimpleChinesestories你会读一些简单的汉语故事吗？（2）job意为“工作”，是可数名词。work意为“工作”时，是不可数名词。例如：

What

an

interesting

job!

多有趣的工作啊！

What

interesting

work!

多有趣的工作啊！

（3）over

and

over

again意为“反复地，再三”。例如：

Please

read

the

text

over

and

over

again.

请反复诵读课文。

He

told

me

to

get

there

on

time

over

and

over

again.

他再三要求我按时到那里。4.But

many

scientists

disagree

with

Mr.

White.

但是很多科学家不同意怀特先生的观点。

disagree是agree的反义词，意为“不同意”。常用结构：disagree

to

do

sth.

“不同意做某事”，disagree

with

sb.“不同意某人的观点”和“disagree

that…”“不同意……”。例如：

He

disagreed

to

go

fishing

with

us.

他不同意和我们一起去钓鱼。

I

disagree

with

her.

我不同意她的意见。

I

disagree

that

teenagers

can

smoke.

我不同意青少年抽烟。5.However,

they

agree

it

may

take

hundreds

of

years.

然而，他们认同这需要几百年的时间。

hundreds

of是“几百，数百”的意思，表达的是一个不确定的数目。在这个结构中，hundred必须用复数形式，且后面一定要跟of。dozen，thousand，million等数词用法相同。例如：

There

are

hundreds

of

birds

flying

in

the

sky.

天上有几百只鸟在飞翔。

Thousands

of

people

go

out

for

a

trip

during

the

May

Day

holiday.

五一假期期间成千上万的人出去旅行。

They

spent

millions

of

dollars

on

the

building.

他们在这栋大楼上花了数百万美元。6.This

was

not

possible

20

years

ago,

but

computers

and

rockets

also

seemed

impossible

100

years

ago.

这在20年前是不可能的，但是电脑、火箭在100年前也是不可能的。

（1）seem意为“似乎;看起来好像”，作连系动词，后面跟形容词、名词或不定式等作宾语。例如：

It

seems

to

rain.

似乎要下雨了。

He

seemed

sad

yesterday.

他昨天似乎很伤心。

They

seemed

to

do

very

well

in

the

match.

他们好像在比赛中取得了很好的成绩。

（2）impossible的用法。

①impossible是形容词，意为“不可能的”。它是由形容词possible加否定前缀im-构成的形容词，常作表语，也常用于“It

is

impossible

to

do

sth.”

句式中，意为“做某事是不可能的”，如果要表示“对某人来说，做某事是不可能的”，在不定式前加for

sb.。例如：

It

is

impossible（for

me）

to

finish

the

work

in

an

hour.

（让我）在一个小时内完成这项工作是不可能的。

②在句型“It

is

+

adj.

+

（for

sb.）

to

do

sth.”中，it是形式主语，真正的主语为动词不定式短语。例如：

It’s

dangerous

for

the

children

to

swim

in

rivers.

在河里游泳对小孩子来说很危险。

【注意】如果形容词用于描述人的性格或品质，如clever，kind，nice等，则要用“It

is

+

adj.

+（of

sb.）

to

do

sth.

”句型。例如：

It’s

very

kind

of

you

to

help

us.

你能帮助我们真是太好了。

It’s

clever

of

him

to

deal

with

the

matter.

他对这件事的处理真是太巧妙了。基础达标一、单项选择。1.There

is

a

Great

Green

Wall

________

the

northern

part

of

China.(

)

CA.through

B.between

C.across2.________

difficult

to

finish

the

work

in

time

because

it

is

much

harder

than

we

thought.(

)

CA.That’s

B.We’re

C.It’s3.Look!Thereare________peopleinthesquare.Whataretheydoing()AA.hundreds

of

B.hundred

of

C.hundreds4.—Whatshouldyoudoifyourfrienddisagrees________you—Ihavetogiveuptheplan.()BA.to

B.with

C.for5.—What’syourprediction（预测）aboutthefuture—Ihavenoidea.Ineverknow________willhappeninthefuture.()BA.that

B.what

C.who二、用括号内所给单词的适当形式填空。1.Don’t

play

with

a

knife.

It’s

__________（danger）.dangerous2.It’s

__________（possible）

to

finish

the

work

in

a

week.

We

need

two

more

workers.impossible3.There

are

many

_________（factory）

in

our

town,

and

people

here

are

getting

richer

and

richer.factories4.My

father

_________（agree）

to

spend

the

holidays

by

plane

because

it

was

expensive.disagreed5.He

________（believe）

that

there

will

be

more

trees

and

fresh

water

in

the

future.believes三、用方框内所给短语的适当形式填空。hundreds

of

fall

down

look

forfor

example

over

and

over

again1.—Whatareyou___________—Mypen.Iputitonmydesk,butIcan’tfinditnow.looking

for2.Walk

carefully

on

the

ice,

or

you

may

__________.fall

down3.Many

animals,

____________,

tigers

and

whales,

will

die

out

if

we

don’t

protect

them.for

example4.I

told

him

about

it

___________________,

but

he

still

didn’t

do

as

I

said.over

and

over

again5.When

winter

comes,

____________

birds

are

on

the

lake

because

it’s

warm

there.hundreds

ofhundreds

of

fall

down

look

forfor

example

over

and

over

again能力训练四、从方框中选择恰当的单词，并用其正确形式填空。fly

computer

already

few

tiredsave

believe

again

sky

possibleWhatourlifewillbelikeinthefutureWewon’tusepapertowriteon.Wecanstudyon1...Andtherewillbe2..carsandlesspollution.Everyonewillplayapartin3..theearth.Theseawillbecleanerandthe4..willbebluer.Sotheenvironmentwillgetbetterandbetter.computersfewersavingsky

I

5.

.

people

will

even

have

robots

in

their

homes.

They

can