初中英语情态动词课件

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S3一、情态动词的那些事儿二、情态动词的那些一般用法三、情态动词的那些推测用法四、情态动词的那些特殊用法情态动词的那些事儿PART

ONE4情态动词的那些词儿

maycanwillshallmightcouldwouldshouldmusthave

toneed…5情态动词的那些特点

Cai

Xukuncan

sing

songs

well.FanChengchengcan

sing

songs

well

too.But

Dong

Yanlei

can’t

sing

songs

well.不能单独作谓语，必须与动词原形连用没有人称和数的变化有助动词的作用6情态动词里的那些一般用法PART

TWO①

may/might②

can/could③

will/would④

shall/should⑤

must/have

to/need7May

I

go

to

the

Ball?Yes,

you

may.Yes,

you

can.may

might8意义：请求获得对方的允许，“可以”might(委婉语气)否定--mustn’t/can’tNo,

youmustn’t.No,

you

can’t.肯定--may/canmust have

toneed否定mustn’t,“禁止”否定 答用

needn’tNo,

you

needn’t.No,

you

don’t

have

to.Must

I

do

thehousework?Yes,

you

must.9must have

toneed3.

must

与have

to

的区别I

must

goto

the

Ball.But

I

have

to

finish

the

housework,

before

I

go

to

theBall.10can

could1.表具备某种能力：能，能够；

could

(过去的能力)Cinderella

could

dance

well

in

the

past.Cinderella

can

dance

wellnow.11can

could2.

表请求和允许：“可以”=may；could(委婉语气)答：肯定--can否定--can’tCould

I

dance

with

you?Yes,

you

can.12知识要点总结13情态动词本意否定含义回答may,might允许不可以may/canmustn’t/can’tcan,could能力，允许不能不可以cancan’tmust必须禁止mustneedn’t1.

--Must

he

sing

the

song

in

English

?--No,he

.needn’tcan’tmustn’tPractice

makesperfect

142.--Mum,

I

visit

the

science

museum

tomorrow

?--I’m

afraid

you

.

It

is

closed

onMonday.must;

mustn’tmay;

can’tshould;

can’tPractice

makesperfect

15but3.--Mum,

I

play

football

this

afternoon

?--Sure, you

finish

your

homework

first.may,couldcan,

mustcan,mustn’tmay,can’tPractice

makesperfect

16will

would用于第二人称的疑问句中，表“请求、建议”等;would(委婉)用于表示意志，意愿或决心，意为“会，愿意”。will指现在，而would指过去。Will

you

marryme?Yes,

I

will.I

will

love

you

forever.17shall

should

shall1.征求对方意见，用于第一，第三人称疑问句中Shall

we

hold

our

wedding

thisSunday?Ok.18shall

should

意为：应该。表达义务，职责（说话人的观点）shouldAs

human,

weshould

be

kind

to

others.191.

--Many

people

play

with

mobile

phones

all

day

instead

of

readingbooks.--That’s

too

bad.

Everyone

be

a

book

lover.

Reading

is

moreenjoyablemayshouldwouldPractice

makesperfect

20Let’s

take

a

break!21PART

THERE情态动词那些推测用法may(might)can(could)must22用于肯定句“可能”might(可能性更小)0％can/could50％may/might100％must<<用于疑问句，否定句“不可能，可能吗”could(可能性较小；可用于肯定句，疑问句，否定句)用在肯定句中“一定”23Guessing

game24It’s

a

he.It’s

not

verytall.He

played

as

Tang

Ren

in

the

movieDetective

Chinatown.Who

is

this?It

can’t

beFanBingbing.It

may/might

be

Guojingming.It

must

beWangBaoqiang.1.

The

girl

in

the

classroom

be

Sarah.

Shehas

gone

tothelibrary.maymustcan’tneedn’tPractice

makesperfect

252．--Whose

book

is

this

?--Iamnotsure.It

be

Mary’s.shallmustmightcanPractice

makesperfect263.--Listen.Ithinkit

be

Mr.

White

singing

in

theoffice.--No.It

be

him.

He

left

for

London

just

now.must,mustn’tmay,mustn’tmust,can’tcan,

canPractice

makesperfect

274.--He

be

in

the

classroom,

Ithink.--No,he

be

in

the

classroom.I

saw

him

go

home

a

minute

ago.can；

may

notmust；

may

notmay；

mustn’tmay；

can'tPractice

makesperfect

28PARTFOUR情态动词的那些特殊用法used

to

do29be/get

used

to

doinghad

better

do情态动词的那些特殊用法

be/get

used

to

doing意义used

to

do

过去常常做某事习惯于做某事Obama

used

to

eat

hamburger,but

now

he

is

used

to

eating

spicy

bar.30情态动词的那些特殊用法

had

betterhad

betterdo

最好做……had

better

not

do

最好不要做……You’d

better

work

hard

in

middle

school.表达“建议”和“忠告”，had

better

do“为好”，建议某人“最好不……”，要用had

better

not

do。311.Mygrandfather

live

in

the

countryside，but

nowhe

living

in

thecity.used

to;used

togot

used

to;gets

used

toused

to;gets

used

toPractice

makesperfect

322.--You'dbetter

too

much

time

chattingonline．--OK．Iwon't．don't

spendnot

tospendto

not

spendnot

spendPractice

makesperfect

331.

--I

don’t

care

what

peoplethink?--Well,you

.

You’re

not

alone

in

thisworld.canmayshouldwill

真题演练

342.

--May

I

take

the

dog

with

me,

sir?--

.

Pets

are

not

allowed

to

enter

thehall.Yes,

you

may.No,

you

mustn’t.Yes,

you

can.No,

you

needn’t.

真题演练

353.

--Will

Jim

fly

to

Taiwan

for

aholiday?--He

try.

In

fact,

it

depends

on

how

muchthe

journey

costs.mayhas

toneedmust