情態(tài)動(dòng)詞課件

情態(tài)動(dòng)詞themodalverb情態(tài)動(dòng)詞themodalverb1一、情態(tài)動(dòng)詞的特點(diǎn):

1.沒有人稱和數(shù)的變化。

2.

有些情態(tài)動(dòng)詞有過去式的變化:

e.g.

will

→

would

,

can

→

could

,

may→

might

,

dare

→

dared

一、情態(tài)動(dòng)詞的特點(diǎn):

2本身有一定的詞義，但不能獨(dú)立做謂語，它和實(shí)義動(dòng)詞一起構(gòu)成合成謂語。常用情態(tài)動(dòng)詞can/could;may/mightmustshould/oughttoshallwilldareneed補(bǔ)充短語：cannever/can’t…….too無論怎樣也不過分。越。。。。。越好youcan’tbetoocarefulwhilecrosstheroad.情態(tài)動(dòng)詞本身有一定的詞義，但不能獨(dú)立做謂語，它和實(shí)義動(dòng)詞一起構(gòu)成31Can表示與生俱來的一種能力beableto強(qiáng)調(diào)通過后天學(xué)習(xí)和努力獲得的能力或在某個(gè)客觀的場(chǎng)合和背景下能做到的。Hecanswim,andhewillbeabletoswimashorewhentheboatsinks.2表示一種許可其中could比can更委婉、更禮貌。CouldItakethisseat,please?canIuseyourpen?Yes,youcan.1Can表示與生俱來的一種能力beabl43

表示可能性

hecan’thavegonetoshanghai,becauseIsawhimjustnow.Couldhavedone本該做而未做（與過去事實(shí)相反的假設(shè)）hecouldhavegonetherebybus.4表不肯定

canthisbetrue?Itcan’tbetrue.Doyouthinkhecouldhaverememberedthedetailsunderthosecircumstances?can/could的用法3表示可能性can/could的用法51、用于正式場(chǎng)合表示許可MayIuseyourdictionary,professorsmith?yes,youmay.2、用于肯定句，疑問句，否定句中表示可能性You’dbettertakeanumbrellawithyou;itmayrain.ifhehadfollowmyadvice,hemighthavepassedthedrivingtest.May/might的用法1、用于正式場(chǎng)合表示許可May/might的用法63、用于感嘆句中表示愿望

mayyouhaveagoodluck.4、用于目的狀語從句中表示“目的”Westartedearlyinthemorningsothatwemightarrivethereintimeforthemeeting.5、表示讓步Anystateshouldprovideitspeoplewiththerighttoexistnomatterwhatpoliticalsystemitmayadopt.3、用于感嘆句中表示愿望71、表示即刻或?qū)淼呢?zé)任或義務(wù)Youmustcleantheclassroomafterschool.對(duì)must的提問回答要用needn’t注意：must指自己的主觀的責(zé)任或義務(wù)，haveto指外界施加的責(zé)任或義務(wù)Imuststudyharder.Ihavetostayathomelookingaftermymotherbecausesheisill.Must的用法：1、表示即刻或?qū)淼呢?zé)任或義務(wù)Must的用法：82、must用于否定句中表禁止

youmustn’tplayfootballinthestreet.3、用于肯定句中表示“確定或可能”

youmustbeastudent.Imustlookfunnyinthishat.4、表示很有把握的推斷:

一定,

準(zhǔn)是。have

to

2、must用于否定句中表禁止91).

表示必須要做的事:

必須

3)

-Must

I

get

to

the

station

before

three

o'clock?

Yes,

you

must.

(

No,

you

needn't.

)

4)

I'm

afraid

you

will

have

to

wait

a

while.

6)

Mary

____

be

in

Paris,

I

saw

her

in

town

only

a

few

minutes

ago.

A.

mustn't

B.

shouldn't

C.

can't

D.

may

not

3.

must

C1).

表示必須要做的事:

必須

3.

must101、should加動(dòng)詞原形表示責(zé)任、義務(wù)、建議；weshoulddoourworkwell.2、虛擬語氣中should可以省略。Should用在虛擬語氣中表示“驚訝、失望、目的”It’sstrangethatyoushouldsaythattoyourmother.Should的用法：1、should加動(dòng)詞原形表示責(zé)任、義務(wù)、建議；Shoul113、shouldhavedone過去該做而沒有做的事，含有委婉的責(zé)備eg:youshouldhavetoldmethatnewsearlier.Should+havedone針對(duì)過去某事的推測(cè)hestartedsoearly,soheshouldhavearrivedbynow3、shouldhavedone過去該做而沒有做的事，121、表道德義務(wù)或建議yououghttogothereatonce.2、oughttohavedone對(duì)過去某事的推測(cè)或責(zé)備

yououghttohavestudiedharder.注意：oughtto的語氣比should強(qiáng)oughtto的用法：1、表道德義務(wù)或建議oughtto的用法：131)

You

to

smoke

too

much.

2)

She

____

for

what

she

has

done.

A.

ought

to

praise

B.

ought

be

praised

C.

ought

to

have

praised

D.

ought

to

be

praisedoughtn't1)

You

to

smoke

t141)

Don't

smoke

in

the

meeting

room,

___

you?

A.

do

youB.

will

you

C.

can

you

D.

could

you

2)It's

my

birthday

tomorrow.

Don't

forget

to

come

to

my

party.

-

_____

.

A.

I

don't

B.

I

won't

C.

I

can't

D.

I

haven't1)

Don't

smoke

in

the

meeting

15YouhavemydictionaryassoonasMaryreturnitto.A.willB.shallC.wouldD.shouldHecanswim,andhesurvivewhentheboatsinks.A.canB.isabletoC.mayD.couldBBYouhavemydiction16

Icleantheclassroom?No,you

Mymotherisillinbed,andIstayathomeandlookafterher.HetakeanapafterlunchandhaveawalkaftersupperIuseyourpen?Yes,ofcourse.Maryisverytimid.Shegooutatnight.Thegroundiswet.Ithaverainedlastnight.Sinceyouarehiselderbrother,youtakecaregoodofhim.mustneedn'thavetowould/willcan/maymustshould/mustIcleantheclassr17

1.

be

able

to

表示經(jīng)過努力后,

能夠做到;

2.can

1).

表示體力或腦力方面的能力;

2).

表示允許、可能性。

could

是can的過去式,

表示過去有能力及過去存在的可能性

;

用于疑問句表示委婉地提出問題。can

,

be

able

to

can

,

be

able

to18

1)

The

fire

spread

through

the

hotel

very

quickly

but

everyone

____

get

out.

A.

had

to

B.

would

C.

could

D.

was

able

to

2)

-Will

you

stay

for

lunch?

-Sorry,

__.

My

brother

is

coming

to

see

me.

(NMET99)

A.

I

mustn't

B.

I

can't

C.

I

needn'tD.

I

won't

1)

The

fire

spread

through

th19thanksforlistenningthanksforlistenning20情態(tài)動(dòng)詞themodalverb情態(tài)動(dòng)詞themodalverb21一、情態(tài)動(dòng)詞的特點(diǎn):

1.沒有人稱和數(shù)的變化。

2.

有些情態(tài)動(dòng)詞有過去式的變化:

e.g.

will

→

would

,

can

→

could

,

may→

might

,

dare

→

dared

一、情態(tài)動(dòng)詞的特點(diǎn):

22本身有一定的詞義，但不能獨(dú)立做謂語，它和實(shí)義動(dòng)詞一起構(gòu)成合成謂語。常用情態(tài)動(dòng)詞can/could;may/mightmustshould/oughttoshallwilldareneed補(bǔ)充短語：cannever/can’t…….too無論怎樣也不過分。越。。。。。越好youcan’tbetoocarefulwhilecrosstheroad.情態(tài)動(dòng)詞本身有一定的詞義，但不能獨(dú)立做謂語，它和實(shí)義動(dòng)詞一起構(gòu)成231Can表示與生俱來的一種能力beableto強(qiáng)調(diào)通過后天學(xué)習(xí)和努力獲得的能力或在某個(gè)客觀的場(chǎng)合和背景下能做到的。Hecanswim,andhewillbeabletoswimashorewhentheboatsinks.2表示一種許可其中could比can更委婉、更禮貌。CouldItakethisseat,please?canIuseyourpen?Yes,youcan.1Can表示與生俱來的一種能力beabl243

表示可能性

hecan’thavegonetoshanghai,becauseIsawhimjustnow.Couldhavedone本該做而未做（與過去事實(shí)相反的假設(shè)）hecouldhavegonetherebybus.4表不肯定

canthisbetrue?Itcan’tbetrue.Doyouthinkhecouldhaverememberedthedetailsunderthosecircumstances?can/could的用法3表示可能性can/could的用法251、用于正式場(chǎng)合表示許可MayIuseyourdictionary,professorsmith?yes,youmay.2、用于肯定句，疑問句，否定句中表示可能性You’dbettertakeanumbrellawithyou;itmayrain.ifhehadfollowmyadvice,hemighthavepassedthedrivingtest.May/might的用法1、用于正式場(chǎng)合表示許可May/might的用法263、用于感嘆句中表示愿望

mayyouhaveagoodluck.4、用于目的狀語從句中表示“目的”Westartedearlyinthemorningsothatwemightarrivethereintimeforthemeeting.5、表示讓步Anystateshouldprovideitspeoplewiththerighttoexistnomatterwhatpoliticalsystemitmayadopt.3、用于感嘆句中表示愿望271、表示即刻或?qū)淼呢?zé)任或義務(wù)Youmustcleantheclassroomafterschool.對(duì)must的提問回答要用needn’t注意：must指自己的主觀的責(zé)任或義務(wù)，haveto指外界施加的責(zé)任或義務(wù)Imuststudyharder.Ihavetostayathomelookingaftermymotherbecausesheisill.Must的用法：1、表示即刻或?qū)淼呢?zé)任或義務(wù)Must的用法：282、must用于否定句中表禁止

youmustn’tplayfootballinthestreet.3、用于肯定句中表示“確定或可能”

youmustbeastudent.Imustlookfunnyinthishat.4、表示很有把握的推斷:

一定,

準(zhǔn)是。have

to

2、must用于否定句中表禁止291).

表示必須要做的事:

必須

3)

-Must

I

get

to

the

station

before

three

o'clock?

Yes,

you

must.

(

No,

you

needn't.

)

4)

I'm

afraid

you

will

have

to

wait

a

while.

6)

Mary

____

be

in

Paris,

I

saw

her

in

town

only

a

few

minutes

ago.

A.

mustn't

B.

shouldn't

C.

can't

D.

may

not

3.

must

C1).

表示必須要做的事:

必須

3.

must301、should加動(dòng)詞原形表示責(zé)任、義務(wù)、建議；weshoulddoourworkwell.2、虛擬語氣中should可以省略。Should用在虛擬語氣中表示“驚訝、失望、目的”It’sstrangethatyoushouldsaythattoyourmother.Should的用法：1、should加動(dòng)詞原形表示責(zé)任、義務(wù)、建議；Shoul313、shouldhavedone過去該做而沒有做的事，含有委婉的責(zé)備eg:youshouldhavetoldmethatnewsearlier.Should+havedone針對(duì)過去某事的推測(cè)hestartedsoearly,soheshouldhavearrivedbynow3、shouldhavedone過去該做而沒有做的事，321、表道德義務(wù)或建議yououghttogothereatonce.2、oughttohavedone對(duì)過去某事的推測(cè)或責(zé)備

yououghttohavestudiedharder.注意：oughtto的語氣比should強(qiáng)oughtto的用法：1、表道德義務(wù)或建議oughtto的用法：331)

You

to

smoke

too

much.

2)

She

____

for

what

she

has

done.

A.

ought

to

praise

B.

ought

be

praised

C.

ought

to

have

praised

D.

ought

to

be

praisedoughtn't1)

You

to

smoke

t341)

Don't

smoke

in

the

meeting

room,

___

you?

A.

do

youB.

will

you

C.

can

you

D.

could

you

2)It's

my

birthday

tomorrow.

Don't

forget

to

come

to

my

party.

-

_____

.

A.

I

don't

B.

I

won't

C.

I

can't

D.

I

haven't1)

Don't

smoke

in

the

meeting

35YouhavemydictionaryassoonasMaryreturnitto.A.willB.shallC.wouldD.shouldHecanswim,andhesurvivewhentheboatsinks.A.canB.isabletoC.mayD.couldBBYouhavemydiction36

Icleantheclassroom?No,you

Mymotherisillinbed,andIstayathomeandlookafterher.Hetake