Lesson-28-The-study-of-living-things-教材解读-课件

Unit5LookintoScienceLesson28TheStudyofLivingThings九年级英语上新课标[冀教]1.Wouldyouliketobeabiologistwhenyougrowup?Whyorwhynot?2.Whatmysteriesofnaturedoyouknowabout?Thinkaboutit！

NewWordsbiologybutterflymigratefantasticcompletelygrandchildmilkweedpuzzlingchemicalfemaleRead

the

lesson

and

complete

the

table.Fantastic

facts

about

butterflies·The

butterflies

always

to

the

same

small

piece

of

forest

and

the

winter

there.·The

butterflies

that

return

to

the

south

are

the

great-great

grandchildren

of

the

butterflies

that

left

for

the

north.·The

females

eggs

on

only

one

plant:milkweed.Things

that

Dr.

Taylor

worries

about·In

Mexico,people

cut

down

the

trees

that

the

butterflies

need

to

on.·In

the

U.S.

and

Canada,farmers

use

chemicals

that

milkweed.Things

that

scientists

can’t

understand·How

do

the

butterflies

know

when

to

fly

south?·How

do

the

great-great

grandchildren

of

the

butterflies

the

same

forest?returnspendkillfindlayrestMain

phrases:·draw

one’s

attention·as

many

as…·leave

for·cut

downRead

the

text

and

find

out

main

phrases

and

sentences.Main

sentences:·Fantastic

facts

about

the

butterfly

have

been

drawing

Dr.

Taylor’s

attention.·The

butterflies

that

return

to

the

south

are

the

great-great

grandchildren

of

the

butterflies

that

left

for

the

north.·When

they

begin

to

travel

north

in

spring,the

females

lay

eggs.·Scientists

still

don’t

understand

how

the

butterflies

know

when

to

fly

south.·This

is

both

puzzling

and

interesting

for

many

scientists.·There

are

many

mysteries

yet

to

be

discovered

by

those

interested

in

science.☆教材解读☆1.Fantastic

facts

about

the

butterfly

have

been

drawing

Dr.

Taylor’s

attention.◆havebeendoingsth.是现在完成进行时,意为“一直在做某事”,表示从过去某时开始的某个动作或状态一直延续到现在,而且还在进行。常常表示动作的延续性、重复性以及感情色彩等。◆drawone’sattention意为“吸引某人的注意力”。2.Here,asmanyas230millionbutterfliesspendthewinter.◆as…as…意为“与……一样……”,两个as之间可加形容词或副词的原级;也可加“many+复数名词”,“much+不可数名词”或“形容词+a/an+单数名词”,还可以在as…as…前加twice,half等词表示前后者倍数或分数关系。as…as的否认形式为notas/so…as…。◆spend为及物动词,意为“度过,花(钱/时间)”,常用于固定结构:spendtime/money(in)doingsth.花费时间/金钱做某事;spendtime/moneyonsth.在某物上花费时间/金钱;spendtimewithsb.和某人一起度过时光,句子的主语应为人,spend的过去式和过去分词都是spent。3.Thebutterfliesthatreturntothesoutharethegreat-greatgrandchildrenofthebutterfliesthatleftforthenorth.◆thatreturntothesouth和thatleftforthenorth都是定语从句。◆leavefor意为“动身去……”。leave意为“离开”,是位移动词,可使用现在进行时表将来;leave与表示一段时间的状语连用时,应改为beaway(from)。4.Whentheybegintotravelnorthinspring,thefemaleslayeggs.◆本句中的travel为动词,原意是“旅游,旅行”,此处意为“迁徙”。◆本句中的north为副词,意为“向北方”,也可说:traveltothenorth,此时north为名词。◆layeggs意为“产卵”。【注意】lay的过去式和过去分词为laid,现在分词为laying。5.ButinMexico,peoplecutdownthetreesthatthebutterfliesneedtorestonbecausetheywantmorelandforfarming.◆本句中的cutdown意为“砍伐”。◆rest在本句中意为“暂停;停止”。

6.Scientistsstilldon’tunderstandhowthebutterfliesknowwhentoflysouth.whentoflysouth意为“什么时间飞往南方”,是“特殊疑问词+动词不定式”结构。“疑问词+动词不定式”结构实质上是一个名词性结构,它可以改为一个宾语从句。此时从句与主句的主语是一致的。7.Thisisbothpuzzlingandinterestingformanyscientists.both…and…意为“……和……”,用于连接两个并列成分。both…and…连接两个并列成分作主语时,谓语动词使用复数形式。both…and…的同义词组为notonly…but(also)…,意为“不仅……而且……”,反义词组为neither…nor…,意为“既不……也不……”。8.Therearemanymysteriesyettobediscoveredbythoseinterestedinscience.interestedinscience表示“对科学感兴趣的”,作定语,修饰those。beinterestedin表示“对……感兴趣”。Work

in

groups

of

three

to

play

a

game.Task

tips:Each

group

should

prepare

some

pieces

of

paper

and

divide

them

into

three

columns.Student

A

writes

a

person’s

name

in

the

first

column,folds

the

paper

and

passes

it

to

Student

B.Student

B

writes

a

statement

beginning

with“who”,folds

the

paper

and

passes

it

to

Student

C.Student

C

must

finish

the

sentence

and

read

it

out

loud.Example:Mr.

Brownwho

is

a

biologistwillgiveusatalkJoin

the

sentences

to

make

attributive

clauses.Example:We

did

some

experiments

yesterday.The

experiments

were

fantastic.The

experiments

that

we

did

yesterday

were

fantastic.Practice1.I

asked

him

to

mail

the

letter.I

wrote

the

letter

to

my

cousin.

2.Yesterday

I

met

a

boy.The

boy

is

a

new

member

in

our

art

club.

3.Mary

was

carrying

a

bag.The

bag

cost

her

a

lot

of

money.

4.Football

is

a

team

sport.Football

is

popular

all

over

the

world.I

asked

him

to

mail

the

letter

which/that/不填I

wrote

to

my

cousin.Yesterday

I

met

a

boy

who/that

is

a

new

member

in

our

art

club.Mary

was

carrying

a

bag

which/that

cost

her

a

lot

of

money.

Football

is

a

team

sport

which/that

is

popular

all

over

the

world.☆教材解读☆Theexperimentsthatwedidyesterdaywerefantastic.that引导定语从句,关系代词that代替先行词experiments在定语从句中作did的宾语,可省略。此时,也可使用关系代词which。【拓展】在以下情况下,关系代词只能使用that而不能使用which:不定代词作先行词时;先行词前有序数词或形容词的最高级时;先行词中既有人也有物时;先行词前有theonly,just,next等词修饰时;当主句是who/which开头的特殊疑问句时。Ⅱ.用方框中所给词或短语的适当形式填空cutdown,fantastic,draw…attention,butterfly,complete1.Look!There

are

many

among

the

flowers.2.If

you

the

tree,you

would

do

harm

to

the

environment

here.3.The

flowers

are

.4.I

forgot

about

it.5.The

stranger

policemen’s

.butterfliescut

downfantasticcompletelydrew

attentionⅢ.单项填空1.Studying

in

groups

is

necessary

you

want

to

do

well

in

school.

A.if