高一英语英语必修3Unit1语法情态动词课件
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4. 表推测的反应，反义疑问句中不能出现must的 形式，反义形式取决于句中时态
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1.He must be my English teacher, isn’t he?
2. He must have finished his homework, hasn’t he? 3. It must have rained yesterday, didn’t it?
★could 提问，答语用can ---Could I borrow your pen? ---yes, you can.
2020年7月6日星期一
5
2.may和might
may 常用来表示： 1. 在正式文体中表示请求、允许（比can正式）：:
eg. May I come in ?
You may go now. 2. 表示说话人的猜测: “也许” “可能”: 通常只 用于肯定句和否定句中。
You mustn't take drugs.
2020年7月6日星期一
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2. 表“偏要”“偏偏”，违背说话人意愿。 Must you talk in class? ---How much do you earn? ---I’ll tell you if you must know it.
3. 一定，肯定 He must be crazy. He must have stayed up last night.
2020年7月6日星期一
Βιβλιοθήκη Baidu
15
need & dare (dared)
情态动词 ： （无单三形式）
need/dare do sth need/dare not do sth 实意动词： need/dare to do sth don’t/doesn’t/didn’t dare to do sth
2020年7月6日星期一
polluted. （2007 全国I）
A. will
B. would
C. should
D. must
2020年7月6日星期一
22
5 I told your friend how to get to the
hotel, but perhaps I have driven her there. （2007 陕西）
2020年7月6日星期一
18
1 Children under 12 years of age in that
country ____ be under adult
supervision when in a public library.
(2004 上海）
A. must
B. may
C. can
D. need
2020年7月6日星期一
19
2 Some aspects of a pilot’s job_____ be
boring, and pilots often _____ work at inconvenient hours. （2006 湖南） A. can；have to B. may；can
C. have to; may
★祈使句问句与答语一般用will Open the door, will you? --- Please come to my party. --- Yes, I will
3. 表习惯或必然结果 Fish will die without water. I will go to see my former classmates on
eg. Can I sit here?
2020年7月6日星期一
4
2. could的主要用法是： A. could 是can的过去式, 表示与过去 有关的能力 和推测:
We all knew that the young man couldn’t be a doctor. B. could可以代替can表示请求, 但语气较can客气、 委婉:
2020年7月6日星期一
11
should 用法
1. 应该=ought to
You should study hard.
2. 表万一，多位于句首。
Should he come, I would let you know.
3. “居然”，“竟然”,表说话人意料之外。
针对现在---- + V原
针对过去---- should have done
A. dares not to
B. dares not
C. dare not to
D. dare not
2020年7月6日星期一
17
情态动词+have done (针对过去） should/ought to have done shouldn’t have done must have done can’t/couldn’t have done could have done need have done needn’t have done
eating is not allowed here.
— Oh, sorry. (2009湖南卷)
A. must B. will C. may D. need
10. What do you mean, there are only
ten tickets? There ____A___ be twelve.
1. can的主要用法是： A. 表能力
eg. The girl can dance very well. be able to 通过努力做成某事
He was able to reach Mount Qomolangma in 2000. B. 表示说话者的推测﹑事物的可能性:(否、疑）
eg. Can the news be true? C. 在口语中, can可以表示请求或允许：
D. ought to; must
2020年7月6日星期一
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3The weather turned out to be fine
yesterday. I _____ the trouble to carry
my umbrella with me. (2006 江西）
A should have taken
2020年7月6日星期一
2
• 情态动词的特点：
1.情态动词自身都有一定的意义， 但不能表示正在发生或已经发生的 事情，只表示期待或估计某事发生。 2.情态动词除ought和have外，后 面必须接不带to的不定式。 3.情态动词没有人称和数的变化, 也没有非谓语形式。
2020年7月6日星期一
3
1. can和could
I’ve got a cold, so I have to see a doctor.
---Must I stay here?
---Yes, you must./
No, you needn’t./you don’t have to. ★mustn‘t 表禁止，不准，一定不要。
You mustn't play with fire.
The guest may arrive this afternoon.
---Can he attend the meeting?
---Yes, he_m__a_y. I am not sure.
2020年7月6日星期一
6
3. 表示祝愿,位于句首 eg. May you succeed! May you have a good journey!
(2009 全国卷I)
A. should
B. would
C. will
D. shall
2020年7月6日星期一
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11. I can’t leave. She told me that I _B____
stay here until she comes back.
(2009 全国卷II)
A. can B. must C. will D. may
4. may as well=had better do
(最好做某事）
You’d better take notes carefully. You may as well take notes carefully.
2020年7月6日星期一
7
3.will和would
will是助动词还是情态动词？ will用于构成将来时是助动词。 eg. I will tell you something important. 我要告诉你一件重要的事情。
weekends.
2020年7月6日星期一
9
would & used to (过去常常，习惯于） would 现在有可能做，也有可能不做 used to 现在一定没有做 There used to be a big tree. I would go to the library when I was free. I _u_s_e_d_t_o_ to cry when I was a child.
To my surprise, he should be a thief.
He should have lied to me yesterday.
2020年7月6日星期一
12
5.must的主要用法
1. 必须。must表主观“必须”
have to 表客观“不得不”
I must go home this Saturday.
16
1.Being afraid of making mistakes ,he ____ answer his teacher's question
A. doesn't dare B. doesn't dare to
C. daren't to
D. not dare to
2.Having failed the exam. The little boy __go home and face his mom.
2020年7月6日星期一
10
4.shall和 should
shall 用法 1. shall表征求意见，用于一三人称 疑问句中
Shall we go by train, Mom? Shall he attend the meeting? 2.用于二 三人称 的陈述句中，表威胁警告命令允诺等语 气
You shall get a present when I came back. You shall be punished if you break the rules.
Unit 1
Modal Verbs
什么是情态动词？ (Modal Verbs)
情态动词表示说话人的某种 感情或语气，对某一动作 或状态的某种态度。 表示“需要、可以、can/could, 必须、应当”等。 may/might,
must/ have to, shall/should (ought to), will/would need, dare/dared
A. could
B. must
C. might
D. should
2020年7月6日星期一
23
7. (10湖南23) You ___D___ buy a gift, but
you can if you want to.
A. must
B. mustn’t
C. have to D. don’t have to
B could have taken
C needn’t have taken
D mustn’t have taken
2020年7月6日星期一
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4 —How’s your tour around the North
Lake? Is it beautiful?
—It ________ be, but it is now heavily
情态动词：1.表意愿或意志 I will never do it again. If you will marry me, whatever I have is yours, and mines is yours.
2020年7月6日星期一
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2.提出 请求或建议 ,在疑问句中用于第二人称。
eg: If you want help, let me know, will you? Will you type this, please?
8. (10江西23) I have told you the truth.
___A___ I keep repeating it?
A. Must B. Can C. May D. Will
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9. — It’s the office! So you __A___ know
2020年7月6日星期一
14
1.He must be my English teacher, isn’t he?
2. He must have finished his homework, hasn’t he? 3. It must have rained yesterday, didn’t it?
★could 提问，答语用can ---Could I borrow your pen? ---yes, you can.
2020年7月6日星期一
5
2.may和might
may 常用来表示： 1. 在正式文体中表示请求、允许（比can正式）：:
eg. May I come in ?
You may go now. 2. 表示说话人的猜测: “也许” “可能”: 通常只 用于肯定句和否定句中。
You mustn't take drugs.
2020年7月6日星期一
13
2. 表“偏要”“偏偏”，违背说话人意愿。 Must you talk in class? ---How much do you earn? ---I’ll tell you if you must know it.
3. 一定，肯定 He must be crazy. He must have stayed up last night.
2020年7月6日星期一
Βιβλιοθήκη Baidu
15
need & dare (dared)
情态动词 ： （无单三形式）
need/dare do sth need/dare not do sth 实意动词： need/dare to do sth don’t/doesn’t/didn’t dare to do sth
2020年7月6日星期一
polluted. （2007 全国I）
A. will
B. would
C. should
D. must
2020年7月6日星期一
22
5 I told your friend how to get to the
hotel, but perhaps I have driven her there. （2007 陕西）
2020年7月6日星期一
18
1 Children under 12 years of age in that
country ____ be under adult
supervision when in a public library.
(2004 上海）
A. must
B. may
C. can
D. need
2020年7月6日星期一
19
2 Some aspects of a pilot’s job_____ be
boring, and pilots often _____ work at inconvenient hours. （2006 湖南） A. can；have to B. may；can
C. have to; may
★祈使句问句与答语一般用will Open the door, will you? --- Please come to my party. --- Yes, I will
3. 表习惯或必然结果 Fish will die without water. I will go to see my former classmates on
eg. Can I sit here?
2020年7月6日星期一
4
2. could的主要用法是： A. could 是can的过去式, 表示与过去 有关的能力 和推测:
We all knew that the young man couldn’t be a doctor. B. could可以代替can表示请求, 但语气较can客气、 委婉:
2020年7月6日星期一
11
should 用法
1. 应该=ought to
You should study hard.
2. 表万一，多位于句首。
Should he come, I would let you know.
3. “居然”，“竟然”,表说话人意料之外。
针对现在---- + V原
针对过去---- should have done
A. dares not to
B. dares not
C. dare not to
D. dare not
2020年7月6日星期一
17
情态动词+have done (针对过去） should/ought to have done shouldn’t have done must have done can’t/couldn’t have done could have done need have done needn’t have done
eating is not allowed here.
— Oh, sorry. (2009湖南卷)
A. must B. will C. may D. need
10. What do you mean, there are only
ten tickets? There ____A___ be twelve.
1. can的主要用法是： A. 表能力
eg. The girl can dance very well. be able to 通过努力做成某事
He was able to reach Mount Qomolangma in 2000. B. 表示说话者的推测﹑事物的可能性:(否、疑）
eg. Can the news be true? C. 在口语中, can可以表示请求或允许：
D. ought to; must
2020年7月6日星期一
20
3The weather turned out to be fine
yesterday. I _____ the trouble to carry
my umbrella with me. (2006 江西）
A should have taken
2020年7月6日星期一
2
• 情态动词的特点：
1.情态动词自身都有一定的意义， 但不能表示正在发生或已经发生的 事情，只表示期待或估计某事发生。 2.情态动词除ought和have外，后 面必须接不带to的不定式。 3.情态动词没有人称和数的变化, 也没有非谓语形式。
2020年7月6日星期一
3
1. can和could
I’ve got a cold, so I have to see a doctor.
---Must I stay here?
---Yes, you must./
No, you needn’t./you don’t have to. ★mustn‘t 表禁止，不准，一定不要。
You mustn't play with fire.
The guest may arrive this afternoon.
---Can he attend the meeting?
---Yes, he_m__a_y. I am not sure.
2020年7月6日星期一
6
3. 表示祝愿,位于句首 eg. May you succeed! May you have a good journey!
(2009 全国卷I)
A. should
B. would
C. will
D. shall
2020年7月6日星期一
25
11. I can’t leave. She told me that I _B____
stay here until she comes back.
(2009 全国卷II)
A. can B. must C. will D. may
4. may as well=had better do
(最好做某事）
You’d better take notes carefully. You may as well take notes carefully.
2020年7月6日星期一
7
3.will和would
will是助动词还是情态动词？ will用于构成将来时是助动词。 eg. I will tell you something important. 我要告诉你一件重要的事情。
weekends.
2020年7月6日星期一
9
would & used to (过去常常，习惯于） would 现在有可能做，也有可能不做 used to 现在一定没有做 There used to be a big tree. I would go to the library when I was free. I _u_s_e_d_t_o_ to cry when I was a child.
To my surprise, he should be a thief.
He should have lied to me yesterday.
2020年7月6日星期一
12
5.must的主要用法
1. 必须。must表主观“必须”
have to 表客观“不得不”
I must go home this Saturday.
16
1.Being afraid of making mistakes ,he ____ answer his teacher's question
A. doesn't dare B. doesn't dare to
C. daren't to
D. not dare to
2.Having failed the exam. The little boy __go home and face his mom.
2020年7月6日星期一
10
4.shall和 should
shall 用法 1. shall表征求意见，用于一三人称 疑问句中
Shall we go by train, Mom? Shall he attend the meeting? 2.用于二 三人称 的陈述句中，表威胁警告命令允诺等语 气
You shall get a present when I came back. You shall be punished if you break the rules.
Unit 1
Modal Verbs
什么是情态动词？ (Modal Verbs)
情态动词表示说话人的某种 感情或语气，对某一动作 或状态的某种态度。 表示“需要、可以、can/could, 必须、应当”等。 may/might,
must/ have to, shall/should (ought to), will/would need, dare/dared
A. could
B. must
C. might
D. should
2020年7月6日星期一
23
7. (10湖南23) You ___D___ buy a gift, but
you can if you want to.
A. must
B. mustn’t
C. have to D. don’t have to
B could have taken
C needn’t have taken
D mustn’t have taken
2020年7月6日星期一
21
4 —How’s your tour around the North
Lake? Is it beautiful?
—It ________ be, but it is now heavily
情态动词：1.表意愿或意志 I will never do it again. If you will marry me, whatever I have is yours, and mines is yours.
2020年7月6日星期一
8
2.提出 请求或建议 ,在疑问句中用于第二人称。
eg: If you want help, let me know, will you? Will you type this, please?
8. (10江西23) I have told you the truth.
___A___ I keep repeating it?
A. Must B. Can C. May D. Will
2020年7月6日星期一
24
9. — It’s the office! So you __A___ know