Unit2 Healthy eating Period4 Grammar Modal verbs（34PPT)

(共32张PPT)
Period 4: Grammar Modal verbs

Grammar
Modal verbs
情态动词(二)
小测试：
1.--Are you coming to Jeff’s party?
--I’m not sure. I ____go to the concert instead.
A. must B. would
C. should D. might

2. Mary __be in Paris，for I saw her in the town only a few minutes ago．
A．mustn't B．can't
C．shouldn't D．may not

B
D
3.--_____the news be true?
—No, it_____be true.
A. Can, can’t B. May, can’t
C. May, may not D. Must, mustn’t
注意:may和might都不用于疑问句中，表示推测。
Can ／Could it be cloudy tomorrow ？

May ／Might it be cloudy tomorrow ？
A
?
?
4.----Could I borrow your dictionary?
----Yes, of course you ____.
A.might B.will
C.can D.should
5. -----____he turn up the radio?
-----Yes, please.
A.Will B.Would
C.Does D.Shall

C
D
Contents：
一.常见情态动词用法（Ⅱ）
6.dare
7.need
8.used to /would
二.情态动词+have done
1)must have done
2)can’t/couldn’t have done
3)may/might have done
4)should have done
5)needn’t have done
三.考点总结
四.巩固练习






接上节：
6.dare
1)情态动词时 dare- dared daren’t
Dare he do it ? He dared not do it.
2) 实义动词时 dare to do
She dared to walk at night.
I dare say=used when you are saying that sth is probable?
我想；很可能；大概
I dare say you know about it already.?
你大概已经知道了。?

She didn’t dare (to)…
7.need
情态动词时，多用于疑问句和否定句中
You needn’t call him.
– Need I come?

Yes,you_____________
No, you _____________
2) 实义动词时
(sb) need to do
He needs _____________.
(sth) need to be done/doing
The tree needs _____________
must
needn’t/don’t have to.
to buy a house
to be watered/watering.
总结：
need和dare既可用作情态动词，也可用作实义动词。
用作情态动词时，主要用于否定句和疑问句。
用作实义动词时，可用于各种句式。
1)用作情态动词
You?needn’t?telephone?him?now.???
I?don’t?think?you?need?worry.???

She?dare?not?go?out?alone?at?night.?
? How?dare?you?say?I’m?unfair???
2) 用作实义动词
You?don’t?need?to?do?it?yourself.???
We?need?to?tell?them?the?news.

We should dare to give our own opinion.
He did not dare (to) look up.
I dare say he’ll come again.
（I dare say…很可能）?
1) She is a bit shy and _____ stand up and answer the teacher's questions.
A.dares not B.doesn't dare to
C.dare not to D.dares not to

2) I wonder how he ___ to his father like that.
A.dared speak B.dare speaking
C.dared to speaking D.dare to speak
B
A
高考真题
3)You _____________ to the meeting tomorrow if you have something important to do.
A. needn’t to come
B. don’t need come
C. don’t need coming
D. needn’t come
D
8.used to /would
1)表示过去常常做某事。 would带有一个特定的时间状语
Whenever we were in the country, we _____________play
hide-and-seek in the fields.

2)表示过去的状态，只能用 used to，不可用would。

There ____________ be a park.

练一练：
He used to be a quiet boy. ( )
He would be a quiet boy. ( )

would
used to
√
×
3)used to 强调过去的行为同现在的对比，含有“过去怎样而现在却不这样了”的意思
而would则单纯表示过去的习惯性动作，常和often, every day等连用。
She isn’t what she _____________be.
她跟过去不一样了.
We ____________sit in the yard every evening and listen to his story. （表示过去的习惯性行为）
used to
would


二.情态动词+ have done
1.must have done一定做过了某事
对过去已经发生的事的肯定推测.(只用于肯定句)
他一定上床睡觉了，因为灯熄了。
He must have gone to bed, for the light was out.
我的笔在哪里呢？我一定把它弄丢了。
Where is my pen? I must have lost it.

2.can’t/couldn’t have done不可能、不会做过某事

Mick __________________ (find) his car, for he came to work by bus this morning.
(不可能/不会找到车)
can’t/couldn’t have found
注意: could+ have done
①表示对过去发生的事的推测, 可与can互换.
②表示 过去能做，而没有做某事, 不可与can替换.
意为:“本来可以做/能做” （虚拟语气）有时含有责备 或遗憾的意思.

练一练：
---I stayed at a hotel while in New York.
---Oh. Did you? You ________________ (stay )with Barbara.
You ________________(do)it better.
You ________________ (come) earlier.


could have stayed
could have done
could have come
3.may/might have done 表示推测,可能性更小, 主要用于肯定句.译为: “或许”
He __________________ (go)to the library.
他或许已经去图书馆了.
might +have done 有时含有委婉的责备或庆幸等感情.
这时不能用may（虚拟语气）
You ____________ (tell) me earlier.
你本可以早点把消息告诉我的.
may/might have gone
might have told
4. should have done 表示本应该做 某事而没有做某事，
有指责之意, 含有“后悔,遗憾,责备,批评”之意.
你本应该更细心些.
You should have been more careful.

你本不该告诉他这事.
You shouldn’t have told him about it.

5. needn’t have done
表示“本来用不着, 本不必” 之意.
You ________________（ask）him.
(But you asked him.)
You ________________(come).
（Because I have finished the work.）
needn’t have asked
needn’t have come
三.情态动词考点总结
一)can,could,may,might,must 表示判断的用法比较

1. The light is on in the office now, so there _______be someone in it, isn’t there?
2. I’m not sure whether he will come today. He ____________be ill today.
3. Tom has gone to Beijing, so you ______ see him in our school now.
must
may/might
can’t

二)情态动词表示推测的用法
情态动词可用来表示推测,语气从强到弱的顺序是：
１．must所表示的可能性最大，最有把握，意为“一 定”。
２．can和could主要用于否定句和疑问句中 ，can’t或couldn’t
表示“不可能”
３．may 和 might表示可能，，might相对于 may 来说，
表示的可能性更小一些。
must
—should
— can
— may
— could
— might
三)表示否定的情态动词的用法: (考点)
mustn’t
needn’t
can’t
may not
shouldn’t
不准, 禁止
没必要 ( = don’t have to )
不能; 不可能
或许不; 可能不
不应该 ( = ought not to )
She may not be at home.
She can’t be at home.
They shouldn’t be there right now.
练一练：注意对need问句的回答:
--Need I finish the work today?
--Yes, ________________.
No, ______________.
No, ________________.
you must
you needn’t
you don’t have to
needn’t 对其它情态动词的回答:

--Shall I tell John about it?
--No, you __________.
--No, you __________.
--Must we do it now?
--No, you __________.
--No, you __________.
needn’t
don’t have to
needn’t
don’t have to
四.巩固练习

1. When we got to the cinema, the film hasn’t started yet, so we ____.
A. needn’t hurry　 B. didn’t need hurry　　
C. needn’t to hurry D. needn’t have hurried

2. It was really very dangerous; you ____ him seriously.
A. might have injured　　B. could injure　　
C. should have injured　 D. must injure
D
A
巩固练习
3. As he had heart attack, he was told that he ____ continue the work.
A. needn’t B. may not C. mustn’t　 D. can't

4. Two eyes ____see more than one.
　 A. can　B. may　　C. will　　D. should
A
C
5. Where is my pen? I ____it.
A. might lose B. would have lost
C. should have lost D. must have lost

6.I told Sally how to get here, but perhaps I___for her.
A.had to write it out
B.ought to write it out
C.must have written it out
D.should have written it out

D
D
7. ---There were already five people in the car, but they managed to take me as well.
---It ____ a comfortable journey.
A. can’t be B. shouldn’t be
C. mustn’t have been D. couldn’t have been
8. It’s nearly seven o’clock. Jack ___ be here at any moment.
A. must B. need C. should D. could
D
C
9. We didn’t see Tom at the meeting yesterday. He ??????? it.
A. mustn’t have attended?
B. cannot have attended
C. needn’t have attended?
D. would have not attended
B
10. There is someone knocking at the door. ??????? it be Tom?
? A. Can? B. Must? C. Should? D. Ought to
A
1. The ground is rather wet, so it _______have rained last night, didn’t it?
2. Tom ____have gone to Shanghai, but I’m still not sure about it.
3. The ground is very dry, so it _____have rained last night.
4. Someone must have broken into our bedroom. Who________have done it?
5. I really regretted wasting the hours when I ______have studied hard, but it was too late.
must
may
can’t
could
should

6.Your home is not far from your school, so you ______
have left in such a hurry then.

7. I’m very sorry for the words I_______ have said to you at
that moment.
8. ---I paid a visit to New York last month and we stayed at a nice hotel.
---Oh,you _______have stayed with Barbara.She is always willing to do you a favour.
shouldn’t

could
needn’t



Homework:
1.Recite the usage of Modal verbs
2.Do some more exercises