情态动词[下学期]
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课件22张PPT。情态动词与虚拟语气情态动词
虚拟语气
情态动词1.will, would 与shall, should
will (构成一般将来时)将会;过去式would
There will be an end to slavery. Slaves will have their freedom.
would (过去反复发生)过去常常
He would sit for hours, deeply thinking.
shall （用于一、三人称问句中，征求意见）好 吗；否定形式为shan‘t
Shall we start the meeting now?
Shall he come and see you?
will 情态动词 意愿 If you will listen to me, I would like to tell you a story. 名词 at will 随意 Where there is a will, there is a way.
注：1.Shall 表示说话者的意图、允诺、警告、命令、决心时，用于二、三人称。
You shall get our answer this afternoon.
The enemy shall be wiped.
shall 表示义务和规定时，用于第三人称。
The new regulation shall take effect on June 1st.
Should (表示劝告、建议）应该
You should keep your promise.
2.should 常表示情理上“好不好”ought to 指道义上有责任。should 表惊讶，愤怒语气
It is surprising that he should be so foolish.
Should 用在疑问词后面
-where is the dictionary?
-How should l know.
2.must can may could might
must 必须、定要；否定式needn‘t(不必）/mustn’t(不许)
Must I start right now?
No,you needn’t.
Mother is busy now.You mustn’t disturb her.
must （表示推测、用于肯定句中）定是 There must be a mistake. You must be joking.
must (表示一种无可奈何的口气）偏偏
At a time when everyone was in bed, he must turn on his radio.
Can ①（表示能力能会；过去式 could
I can sing my ABC.
②（表示许可、请求，与may同）
③（表示推测，用于否定疑问句中）可能
Who can it be?It may be John.No,it can’t be him.
could 语气上比can更委婉
Could you give me a hand？
Could I use your bike? Yes,you can.May (表示请求、许可）可以 ；否定为can‘t(不可以）/mustn’t (不许）
May I use your dictionary? Sorry,you can’t.
May I come into the room to see Mr Green?
No,you mustn’t.He needs to have a good rest.
May(表示推测、用于肯定句中，语气弱于must)
Where is Tom ?He may be playing in the garden.
May 祝愿
May all your dreams come true in the future!
May you have an everlasting marriage!Might 的语气弱于may.
Tom might have realized his misdoings.
注意：在将来时当中，
will/shall have to表示将不得不
shall/will be able to表示将能够
I shall have to ask her to leave the company.
By the end of this year, we shall be able to save enough money for such a useful book.
3.Need dare
这两个词既可以作为情态动词又可以作为实义动词。need /dare作为情态动词时，与其他情态动词相同。
You needn’t show your pass at the entrance unless the guard asks you for it.
If the enemy dare enter the village,we’ll fight against them to the end.
Need 作为实义动词，后接n. /to do /动名词。
接动名词时，need doing=need to be done
The garden needs watering=The garden needs to be watered.Dare 作为情态动词，过去式dared
How dare you speak to him like that?
作为实义动词，用在疑问和否定句中时，to 可以省去。
He dares to go out alone at night.
He doesn’t dare (to）go out alone at night.
Does he dare (to) go out alone at night?注意：情态动词+have done
1.表示过去已经发生的事情进行推测。 The road isn’t wet.It can’t have rained last night.
I don’t know why she didn’t call me yesterday.Could she have forgotten my telephone number?
2.表示对过去发生的事情一种责备语气 I could have done the work better.
You should have thought of that earlier.
They shouldn’t have left so soon.
You needn’t have told them about that . When you finish your works,they might have gone for miles.
She ought to have left home without telling her mother.
He needn’t have gone to the station yesterday.
练习
1.I hope to win and ____.
A.so shall I B.so I shall C.so I do D.so do I
2.She has to answer for what she has done,____?
A.doesn’t she B.hasn’t she
C.has she D.does she
3.You ___to the meeting this afternoon if you have something important to do.
A.needn’t B.needn’t to come
C.needn’t come D.don’t need come4.Look! what you have done. You ___be more careful.
A.may B.should C.would D.had to
5.---Shall I tell John about it?
---No,you ____ .I’ve told him already.
A.needn’t B.wouldn’t C.mustn’t D.shouldn’t
7.She doesn’t answer the doorbell. She ___ be asleep.
A.might B.ought to C.should D.must have 8.___he ___a famous doctor at that time?He was so young then.
A.Can;be B.Must; be
C.Can;have been D.Must;have been
9.They ___ the plane,or perhaps they have been prevented from coming for some reasons.
A.Can have lost B.may have lost
C.can have missed .D.may have missed10.I can’t find Mary anywhere.She must ___ her homework upstairs.
A.do B.have done
C.be doing D.have been done
11.He ___ if he works hard for the people.
A.shall praise B.shall be praised
C.will praise D.will be praised
12.Did he need ___ then?
A.leave B.leaving
C.left D.to leave
13.Why ___ you always interrupt me?
A.must B.may C.can D.will
14.---Oh,I’ve missed a good chance.
---Yes, you ___ the job when it was ___.
A. should have taken; offered
B. should take ;offered
C. might have taken; offering
D. had taken ;offered
15.---She must have gone back to the valley.
---___ she ____.The entrance to it was nowhere to be found.
A.No;mustn’t B.Yes;might
C.Yes;could D.No;couldn’t---thank u for watching---
bye-bye
虚拟语气
情态动词1.will, would 与shall, should
will (构成一般将来时)将会;过去式would
There will be an end to slavery. Slaves will have their freedom.
would (过去反复发生)过去常常
He would sit for hours, deeply thinking.
shall （用于一、三人称问句中，征求意见）好 吗；否定形式为shan‘t
Shall we start the meeting now?
Shall he come and see you?
will 情态动词 意愿 If you will listen to me, I would like to tell you a story. 名词 at will 随意 Where there is a will, there is a way.
注：1.Shall 表示说话者的意图、允诺、警告、命令、决心时，用于二、三人称。
You shall get our answer this afternoon.
The enemy shall be wiped.
shall 表示义务和规定时，用于第三人称。
The new regulation shall take effect on June 1st.
Should (表示劝告、建议）应该
You should keep your promise.
2.should 常表示情理上“好不好”ought to 指道义上有责任。should 表惊讶，愤怒语气
It is surprising that he should be so foolish.
Should 用在疑问词后面
-where is the dictionary?
-How should l know.
2.must can may could might
must 必须、定要；否定式needn‘t(不必）/mustn’t(不许)
Must I start right now?
No,you needn’t.
Mother is busy now.You mustn’t disturb her.
must （表示推测、用于肯定句中）定是 There must be a mistake. You must be joking.
must (表示一种无可奈何的口气）偏偏
At a time when everyone was in bed, he must turn on his radio.
Can ①（表示能力能会；过去式 could
I can sing my ABC.
②（表示许可、请求，与may同）
③（表示推测，用于否定疑问句中）可能
Who can it be?It may be John.No,it can’t be him.
could 语气上比can更委婉
Could you give me a hand？
Could I use your bike? Yes,you can.May (表示请求、许可）可以 ；否定为can‘t(不可以）/mustn’t (不许）
May I use your dictionary? Sorry,you can’t.
May I come into the room to see Mr Green?
No,you mustn’t.He needs to have a good rest.
May(表示推测、用于肯定句中，语气弱于must)
Where is Tom ?He may be playing in the garden.
May 祝愿
May all your dreams come true in the future!
May you have an everlasting marriage!Might 的语气弱于may.
Tom might have realized his misdoings.
注意：在将来时当中，
will/shall have to表示将不得不
shall/will be able to表示将能够
I shall have to ask her to leave the company.
By the end of this year, we shall be able to save enough money for such a useful book.
3.Need dare
这两个词既可以作为情态动词又可以作为实义动词。need /dare作为情态动词时，与其他情态动词相同。
You needn’t show your pass at the entrance unless the guard asks you for it.
If the enemy dare enter the village,we’ll fight against them to the end.
Need 作为实义动词，后接n. /to do /动名词。
接动名词时，need doing=need to be done
The garden needs watering=The garden needs to be watered.Dare 作为情态动词，过去式dared
How dare you speak to him like that?
作为实义动词，用在疑问和否定句中时，to 可以省去。
He dares to go out alone at night.
He doesn’t dare (to）go out alone at night.
Does he dare (to) go out alone at night?注意：情态动词+have done
1.表示过去已经发生的事情进行推测。 The road isn’t wet.It can’t have rained last night.
I don’t know why she didn’t call me yesterday.Could she have forgotten my telephone number?
2.表示对过去发生的事情一种责备语气 I could have done the work better.
You should have thought of that earlier.
They shouldn’t have left so soon.
You needn’t have told them about that . When you finish your works,they might have gone for miles.
She ought to have left home without telling her mother.
He needn’t have gone to the station yesterday.
练习
1.I hope to win and ____.
A.so shall I B.so I shall C.so I do D.so do I
2.She has to answer for what she has done,____?
A.doesn’t she B.hasn’t she
C.has she D.does she
3.You ___to the meeting this afternoon if you have something important to do.
A.needn’t B.needn’t to come
C.needn’t come D.don’t need come4.Look! what you have done. You ___be more careful.
A.may B.should C.would D.had to
5.---Shall I tell John about it?
---No,you ____ .I’ve told him already.
A.needn’t B.wouldn’t C.mustn’t D.shouldn’t
7.She doesn’t answer the doorbell. She ___ be asleep.
A.might B.ought to C.should D.must have 8.___he ___a famous doctor at that time?He was so young then.
A.Can;be B.Must; be
C.Can;have been D.Must;have been
9.They ___ the plane,or perhaps they have been prevented from coming for some reasons.
A.Can have lost B.may have lost
C.can have missed .D.may have missed10.I can’t find Mary anywhere.She must ___ her homework upstairs.
A.do B.have done
C.be doing D.have been done
11.He ___ if he works hard for the people.
A.shall praise B.shall be praised
C.will praise D.will be praised
12.Did he need ___ then?
A.leave B.leaving
C.left D.to leave
13.Why ___ you always interrupt me?
A.must B.may C.can D.will
14.---Oh,I’ve missed a good chance.
---Yes, you ___ the job when it was ___.
A. should have taken; offered
B. should take ;offered
C. might have taken; offering
D. had taken ;offered
15.---She must have gone back to the valley.
---___ she ____.The entrance to it was nowhere to be found.
A.No;mustn’t B.Yes;might
C.Yes;could D.No;couldn’t---thank u for watching---
bye-bye