Unit4-learning-about-Language-名师教学设计

2/2Unit4learningaboutLanguage名师教学设计Unit4

Astronomy:

the

science

of

the

stars

Language

points教学目标：1．Get

the

students

to

learn

the

usage

of

some

important

words

and

expressions.

2．To

learn

the

the

complex

structures

of

sentences.

教学重点：1.learn

to

use

some

important

words

and

expressions.

2.Analyse

the

complex

structures

of

sentences.

教学难点：1.Grasp

the

useful

words

and

expressions.

2.Analyse

the

complex

structures

of

sentences

to

know

the

meanings

of

sentences.

教学方法Explaining,

pair

work,

summarizingand

practice.

教学流程：Step1:Revision.

1.Ask

student

to

retell

the

development

of

life

on

the

earth.

Step2.langue

points.

1.

What

it

was

to

become

was

uncertain

until

between

4.5

and

3.8

billion

years

ago

when

the

dust

settled

into

a

solid

globe.

【分析】a.

此复合句的主句为What

it

was

to

become

was

uncertain；从句为_____引导的定语从句。b.

主句中包含一个由what引导的主语从句What

it

was

to

become。c.

until是介词，与其前带否定前缀的形容词uncertain构成not

...

until句式，表示“到……才，在……之前”，引导between

4.5

and

3.8

billion

years

ago作时间状语。2.

The

earth

became

so

violent

that

it

was

not

clear

whether

the

shape

would

last

or

not.地球开始变得激烈动荡，不知道这个固体形状是否会继续存在下去。

a.

此复合句的主句为The

earth

became

so

violent；从句为_____引导的结果状语从句。b.

so

...

that

...

如此……以致…….

violent

adj.

暴力的；强烈的；剧烈的，猛烈的；颜色鲜艳的e.g.

Children

should

not

be

allowed

to

watch

______________.

不应该让小孩看暴力电影。There

was

a

violent

storm

at

sea

that

night

and

their

ship

sank.

Her

dress

was

a

violent

pink.

她的连衣裙是非常鲜艳的粉红色。用violent的适当形式填空。1.

There

was

a(n)

________

reaction

from

the

public.2.

She

________

disagreed

with

what

we

said.3.

We

were

all

surprised

at

the

________

of

his

anger.

3.

They

were

in

time

to

produce

carbon

dioxide,

...,

which

were

to

make

the

earth’s

atmosphere.

它们最终产生了二氧化碳……从而形成了地球的大气层。in

time:

sooner

or

later;

eventuallye.g.

I’ll

see

him

in

time.in

time

(for

sth.

/to

do

sth.):

not

latee.g.

She

will

be

back

in

time

to

prepare

dinner.

拓展与in

time相关的短语。in

no

time

,

at

times

,

at

a

time

,

on

time

,

at

one

time

,once

upon

time

,for

the

time

being,

from

time

to

time.

atmosphere意为“大气，气氛等”。e.g.

There

was

an

atmosphere

of

violence

and

insecurity.

4.

What

is

even

more

important

is

that

as

the

earth

cooled

down,

water

began

to

appear

on

its

surface.

更为重要的是，地球冷却了下来，地球的表面就开始出现了水。【分析】a.

本句的结构是：主语从句（What

is

even

more

important）+

系动词（is）+

表语从句（that

as

the

earth

...

on

its

surface.）b.

表语从句中含有一个由___引导的时间状语从句。5.

…,

because

they

gave

birth

to

young

baby

animals

...

因为它们能从体内生产出幼仔……阅读下列句子，并试着总结give

birth

to的含义及用法。1)

Mrs.

White

gave

birth

to

a

fine

healthy

baby

in

her

late

thirties.2)

Mary

gave

birth

to

a

healthy

baby

girl.3)

It

was

this

event

that

gave

birth

to

the

peace

movement.

【拓展】at

birth

出生时since

/

from

birth

自出生后date

of

birth

出生日期6.

They

are

putting

too

much

carbon

dioxide

into

the

atmosphere,

which

prevents

heat

from

escaping

from

the

earth

into

space.

他们把太多的二氧化碳释放到大气层中，这就使得热量不能从地球上散发到太空中去。阅读下列句子，注意prevent

...

from的意思和用法。1)

There

was

nothing

to

prevent

her

from

doing

so.2)

We

must

prevent

the

water

from

being

polluted.3)

The

emperor

ordered

his

porters

to

prevent

the

speaker

entering

the

building.

prevent

...

from的意思是________________________________。from后多跟动词-ing形式；有时可省略from。[拓展]

近义短语有:

stop

...

from

阻止……干某事;

keep

...

from阻止……干某事。注意:

prevent和stop后的from都可以省略,

而keep

...

from中的from则不能省略，如果省略了,

其意义将发生改变。及时练1)

No

one

can

prevent

the

plans

___

out.A.

to

be

carried

B.

from

carrying

C.

not

to

carry

D.

from

being

carried2)

They

tried

to

prevent

the

plane

from

___

on

the

runway.A.

land

B.

landing

C.

to

land

D.

being

landed7.

How

life

began

on

earth

is

one

of

the

biggest

puzzles

that

scientists

found

hard

to

solve.生命究竟如何起源是科学家们觉得很难解决的最大难题之一。puzzle

n.

谜，一种需要动脑筋的游戏；难题e.g.

Did

you

do

the

crossword

puzzle

in

the

newspaper

today?Scientists

have

been

trying

to

solve

this

puzzle

for

years.

puzzle

vt.

使迷惑，使为难e.g.

What

___________

is

why

his

books

are

so

popular.这本书这么流行让我觉得很迷惑。【拓展】puzzlement

n.

困惑，大惑不解puzzled

adj.

困惑的，迷惑不解的puzzling

adj.

令人困惑的，令人费解的用puzzle的适当形式填空。1.

My

brother’s

recent

behaviour

________

me.2.

Nancy

began

to

think

at

once

about

the

two

________

mysteries

which

she

hoped

to

solve.3.

I’m

still

________

about

why

she

said

that.4.

He

stared

at

the

words

in

complete

____________.

Step3

Complete

the

following

passage

with

the

words

and

aphrases

below

in

the

correct

form.

astronomy

atom

fundamental

puzzle

exist

prevent

…

from

as

a

result

give

birth

to

Is

the

moon

a

planet?

This

question

is

____________

if

students

are

to

show

that

they

understand

the

nature

of

__________.

Some

scientists

think

that

the

earth

___________

the

moon

because

the

moon

circles

our

planet.

Others

believe

that

the

moon

______

before

the

earth

was

formed.They

think

that

earlier

in

time

it

travelled

through

space

as

a

small

planet

which

was

caught

bythe

earth’s

gravity.

__________,

it

goes

around

our

planet.

The

evidence

for

this

theory

is

that

the

_______

that

make

up

the

rocks

on

the

moon

seem

to

be

different

from

those

on

earth.

What

is

clear

is

that

the

moon

is

smaller

than

the

earth

and

this

________

it

_____

escaping

from

the

earth.

Although

its

origin

may

still

be

a

_______,

the

moon

can

never

be

anything

more

than

a

satellite

of

the

earth.

Step5Exercises

I.

根据下列各句句意及所给单词的首字母或汉语提示，写出该单词的正确形式。1.

This

______

(理论)

helps

to

explain

how

animals

communicate

with

each

other.2.

The

final

cost

could

be

as

much

as

one

b_____

dollars.3.

Across

the

g_____,

sea

level

varies

by

hundreds

of

feet.4.

A(n)

_____

(原子)

is

so

small

that

we

can

not

see

it.5.

Smoking

is

h_______

to

health,

but

some

people

cannot

get

rid

of

it.

6.

The

best

way

to

get

that

_____________

(二氧化碳)

into

the

atmosphere

is

to

warm

the

entire

planet.

7.

O_____

is

a

kind

of

gas

that

is

necessary

for

most

animals

and

plants

to

live.8.

I

was

surprised

by

the

_________

(出席)

of