我的公开课——情态动词课件
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情态动词讲解ppt课件
A. may B. might C. could
D. must
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may, might, can, could
表示猜测
➢ 1. They (can/might) ___m__ig_h__t___be away for the
weekend but I’m not sure.
表示许可
➢ 2. You (may/might) __m__a_y_____leave now if you
1.A computer ____ think for itself; it must be told what to do.
A. can’t B. couldn’t C. may not D. might not
1.I thought you ________ like something to read, so I have brought you some books.
2.表示推测时，could不是过去式，只是语气 更委婉；若是推测已发生的事或过去的情况， 用can/could have done
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3.can和be able to辨析 can(could)和be able to都可以表示能力，意思上没有区别。 但can只有现在式和过去式，而be able to则有更多的形式。 如：
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Ⅲ 情态动词的语法特征 1） 情态动词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的 发生。
2） 情态动词除ought 和have 外，后 面只能接动词原形。
3） 情态动词没有人称，数的变化，即 情态动词第三人称单数不加-s。
4） 情态动词没有非谓语形式，即没有 不定式，分词，等形式。
1.It may rain this afternoon. 2.She might come to join us this afternoon. 3.I suppose he might have missed the train.
情态动词(20张PPT)初中英语专项复习课件
看法。
(1)只作情态动词:must;can/could;may/might;ought to
(2)既可作情态动词又可作实义动词:need,dare
((34))既 具可 有作 情情 态态 动动词词某又些可特作征稿稿定助:定hPa动PPvTP，e词T/海h:量asd素ha材tlo持l;/s续hha更odublde;twteirll/would
【知识拓展】
1. must的一般疑问句，肯定回答为Yes, ...must.；否定回答为No, ...needn’t./No, ...don’t have
to.—Must I clean the classroom now? 我必须现在打扫教室吗？
—Yes, you must. 是的，你必须。/No, you don’t have to. /No, you needn’t. 不，你不必。
He promised he would never smoke again. 他承诺他再也不吸烟了。
Their English teacher would tell them stories in
表示过去反复发生的动 English after class.
作或某种倾向
他们的英语老师总是在课后用英语给他们讲故事
新，上千款模板选择总有一
款适合你
知识点二：情态动词的特点
情态动词的特点: (1)情态动词无人称和数的变化(have to除外); (2)情态动词后接动词原形; (3)情态动词的否定式是在其后加not; have to除外 (4)具有助动词的作用，可用来构成否定句、疑问句及用于简明答语; (5)个别情态动词有现在式和稿过定去PP式T两种形式,过去式用来表达更加客气、委 婉的语气，时态性不强，可稿用定于PPT过，海去量、素材现持在续更或将来。
(1)只作情态动词:must;can/could;may/might;ought to
(2)既可作情态动词又可作实义动词:need,dare
((34))既 具可 有作 情情 态态 动动词词某又些可特作征稿稿定助:定hPa动PPvTP，e词T/海h:量asd素ha材tlo持l;/s续hha更odublde;twteirll/would
【知识拓展】
1. must的一般疑问句，肯定回答为Yes, ...must.；否定回答为No, ...needn’t./No, ...don’t have
to.—Must I clean the classroom now? 我必须现在打扫教室吗？
—Yes, you must. 是的，你必须。/No, you don’t have to. /No, you needn’t. 不，你不必。
He promised he would never smoke again. 他承诺他再也不吸烟了。
Their English teacher would tell them stories in
表示过去反复发生的动 English after class.
作或某种倾向
他们的英语老师总是在课后用英语给他们讲故事
新，上千款模板选择总有一
款适合你
知识点二：情态动词的特点
情态动词的特点: (1)情态动词无人称和数的变化(have to除外); (2)情态动词后接动词原形; (3)情态动词的否定式是在其后加not; have to除外 (4)具有助动词的作用，可用来构成否定句、疑问句及用于简明答语; (5)个别情态动词有现在式和稿过定去PP式T两种形式,过去式用来表达更加客气、委 婉的语气，时态性不强，可稿用定于PPT过，海去量、素材现持在续更或将来。
《情态动词课件》ppt课件
现在式 can
may will shall dare must --need --ought to -----used to
2
过去式 could might would should dared
教学目标：情态动词用法归纳(2) 教学重点：
1.情态动词表示推测; 2.情态动词 + have done 结构；
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5. ●When we got to the cinema, the film hadn’t started, so we needn’t have worried. needn’t have done (过去)本来不必做… ●—Mary didn’t turn up last night, did she? —No, she didn’t need to come. We had changed our plan. (没有必要做而实际上也没做).
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2. ＊— There were already five people in the car, but they managed to take me as well. —It couldn’t have been a comfortable journey.
can’t/couldn’t have done(过去)不可能…
(06陕西）
As you worked late yesterday, you A have come this morning. ___ A. needn’t B. may not C. can’t D. mustn’t
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A at 8:30 for the ◆(04全国) Mr. White_____ meeting, but he didn’t show up. A. should have arrived B. should arrive C. should had arrived D. should be arriving ◆(04福建) —I’ll tell Marry about her new job tomorrow. —You ____ D her last week. A. ought to tell B. could have told D. should have told C. must tell
may will shall dare must --need --ought to -----used to
2
过去式 could might would should dared
教学目标：情态动词用法归纳(2) 教学重点：
1.情态动词表示推测; 2.情态动词 + have done 结构；
7
5. ●When we got to the cinema, the film hadn’t started, so we needn’t have worried. needn’t have done (过去)本来不必做… ●—Mary didn’t turn up last night, did she? —No, she didn’t need to come. We had changed our plan. (没有必要做而实际上也没做).
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2. ＊— There were already five people in the car, but they managed to take me as well. —It couldn’t have been a comfortable journey.
can’t/couldn’t have done(过去)不可能…
(06陕西）
As you worked late yesterday, you A have come this morning. ___ A. needn’t B. may not C. can’t D. mustn’t
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A at 8:30 for the ◆(04全国) Mr. White_____ meeting, but he didn’t show up. A. should have arrived B. should arrive C. should had arrived D. should be arriving ◆(04福建) —I’ll tell Marry about her new job tomorrow. —You ____ D her last week. A. ought to tell B. could have told D. should have told C. must tell
情态动词语法讲解PPT课件
2表示“许可”和“不许”
a)请求对方“许可”可用can, could, may, might.
may/might较正式，could/might较委婉
表示给予“许可”通常用can/may,而不用 could/might
Could I use your phone? Yes, of course you can. Might I trouble you for a light? You may indeed.
表示将来的“必须”，常用have to的一定 形式（will/shall have to) 比较：
•We must do it again.(表示现在)
•We’ll have to do it again.(表示将来)
•表示过去的“必须”，常用had to
•I had to leave at six yesterday.
•They must be home by now.（他们现在一定到家了）
will/would表示“推测”可有三种情况
1）对特定事态的推测
A: Who’s that man over there? B: That will be George, no doubt. C: That would be George, I except.
• Can they have missed the bus?
• Yes, they may have.
may not重音落在助动词上，表示 “不可能”，重音落在否定词上，表 示“不许可” , 比较：
•He may not go tomorrow.
•He may not go tomorrow.
•所以在书面语中，表示“不可能” 常用can’t
情态动词全部ppt课件
A．must
B．would
C．should
D．might
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• 翻译 • ----我能在这个房间抽烟吗？ .
---- 可以。 ---- 不行，… ----Might/ May I smoke in this room?
---- Yes, you can.
---- No, you mustn’t
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rule.
(威胁)
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Shall 决心、承诺、警告、命令 you \he\she\they shall…..(二三人称陈述）
When the chairman turns up, nobody shall say a word. 命令 Students shall remain in their seats until the papers have been
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5. should
1. should表示义务、职责、劝告，意 为 “应该”。
eg: You should keep your promise. Students should respect teachers.
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2）表示说话人_惊_讶______等特殊情感。
It’s surprising that Mary should not know Lei Feng.
3.must, need没有时态，但有些情态动词如can、 may,will,have to有一般式和过去式的变化。
4. 情态动词不能单独做谓语，必须和实义动词原形 一起构成谓语。
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情态动词的“时态”形式并不是时间区 别的 主要标志, 不少情况下, 情态动词的 现在式 形式和过去式形式都可用来表 示现在时 间、过去时间和将来时间。
我的公开课-情态动词课件
1. That
be Ann’s husband,
for I am sure that he doesn’t wear
glasses.
A. can’t not
B. may
C. mustn’t
D.
needn’t
2. - Good morning. I got an appointment with Miss Smith yesterday.
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should / ought to表示推测 根据经验的推测，“应当、应该” e.g. You photos should be ready by 12:00. 1. 表示“竟然”，带有感情色彩。
1. e.g. It is strange that you should like him.
can /could 表示推测
1. 常用于否定句或疑问句。 ① e.g. You can’t be hungry already — you had lunch only two hours ago!
2. can用于肯定句中表示理论上的可能性，并不牵涉是否真的会发生 ① e.g. You can hurt yourself if you play in the street.
B. needn’t
have done
C. mustn’t do
D. shouldn’t
have done
6. My MP4
isn’t in my
bag.
Where_____I
have put it？
A. can
B.
must
C.
should
D.
would
做了某事
情态动词表请 求、允许
《英语情态动词》PPT课件
(12) You can't be too careful while driving. 开车时越小心越好。
【结论6】 cannot ... too/enough表示“无论……也不过 分”；“越……越好”。用来加强语气。 (13) I couldn't but choose to wait.
【结论7】cannot but do sth. 不得不；只好 (14) They were able to put out the fire without any help from the firefighters.
(8) Can it be true? (9) You can't be serious! (10) Oh, dear, what on earth can this mean? (11) How could you do such a silly thing? 你怎么能做那样的蠢事呢？ 【结论5】表示惊讶、怀疑、不相信的态度，常用在否 定句、疑问句和感叹句中。
(3)表示“偏执”，“固执” “偏要、硬要” 。 — How old are you, madam? — If you must know, I'm twice my son's age. Don't interrupt me, John. Must you force me to tell you the truth at the moment?
A computer can’t think for itself; it must be told what to do.（一般能力） 句意为：对绝大多数受到威胁时而不能起身逃跑的植物 He is a native speaker of English, so he can of course 来说，最大的问题是动物喜欢吃它们。情态动词can 可 speak English quite well.（一般能力） 表示对能力的否定。 I以表示人的能力和物的性能，故选 am starving to death. I can eat twoB bowls of rice now. （现在的能力） The biggest problem for most plants, which ___just get up and run away when threatened, is that animals like to eat them.(07湖南) A. shan’t B. B can’t C. needn’t D. mustn’t
情态动词精品课件PPT课件
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• It is usually warm in my hometown in March，but it can be rather cold sometimes.
• 我的家乡在三月份通常很暖和，但有时候也会相当冷。 • Mr.Bush is on time for ever ything.How can it be that he was late for the
meeting? • 布什先生做什么事情都很准时，他怎么可能开会迟到呢？ • He can't be in the classroom ，for the light has been turned off. • 他一定不在教室里，因为灯已关了。
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• 2．may用于肯定句中可以用来表示推测，意为“可能”；用于否定句中也可以表示 推测，may not意为“可能不”，表示一种不太确定的语气。may在疑问句中一般不 表示推测。
You'd better not. 等)不，你不可以用。
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• 3．must和have to的用法 • must表示“必须、应该”。否定形式must not(mustn't)表示“不应该、不许可、
不准、禁止”等。在回答must的问句时，否定式常用need not(needn't)或don't have to表示“不必”，而不用must not，因为must not表示“禁止”。must表 示“一定、必定”等推测意义时，一般只用在肯定句中。 • The work must be finished as soon as possible. • 这项工作必须尽快完工。
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• 热点考向二 情态动词表“推测”的用法 • 表示对目前或将来情况的推测往往用“情态动词＋动词原形”这种结构。 • 1．can用于肯定句中表示可能性，意为“有时会”；用于疑问句中可以表示推测，意
• It is usually warm in my hometown in March，but it can be rather cold sometimes.
• 我的家乡在三月份通常很暖和，但有时候也会相当冷。 • Mr.Bush is on time for ever ything.How can it be that he was late for the
meeting? • 布什先生做什么事情都很准时，他怎么可能开会迟到呢？ • He can't be in the classroom ，for the light has been turned off. • 他一定不在教室里，因为灯已关了。
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• 2．may用于肯定句中可以用来表示推测，意为“可能”；用于否定句中也可以表示 推测，may not意为“可能不”，表示一种不太确定的语气。may在疑问句中一般不 表示推测。
You'd better not. 等)不，你不可以用。
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• 3．must和have to的用法 • must表示“必须、应该”。否定形式must not(mustn't)表示“不应该、不许可、
不准、禁止”等。在回答must的问句时，否定式常用need not(needn't)或don't have to表示“不必”，而不用must not，因为must not表示“禁止”。must表 示“一定、必定”等推测意义时，一般只用在肯定句中。 • The work must be finished as soon as possible. • 这项工作必须尽快完工。
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• 热点考向二 情态动词表“推测”的用法 • 表示对目前或将来情况的推测往往用“情态动词＋动词原形”这种结构。 • 1．can用于肯定句中表示可能性，意为“有时会”；用于疑问句中可以表示推测，意
情态动词(共43张PPT)
A．Must; mustn't
B．Will; couldn't
C．May; can't
( C ) It's really hot in the room.You'd better
the
windows. A．not to close B．don't close C．not close
(B )
—You
drive after drinking, Simon.
—You're right.I'll take a taxi.
A．wouldn't B．shouldn't C．ought to
二、用恰当的情态动词填空。
Simon, you mmuussttnn''tt play with the knife.You mmayay
在回答以 may 提问的问句时，肯定回答一般可仍用 may 或 Yes, please./Certainly./Sure./Of course.否定回答根据说话人的语气 由强到弱分别选用： mustn't/can't/may not。 —May I watch TV? 我能看电视吗？ —No, you mustn't.You must play the piano first.不，你禁止看， 你必须先弹钢琴。
need 的基本用法 意为“需要；必要”，作情态动词时常用于否定句和疑问句中。 You needn't hand in your homework tomorrow.你明天不需要 交你的作业。 Need I attend the meeting this afternoon? 我需要今天下午参 加会议吗？
初中英语-情态动词-课件(共31张PPT)
二、情态动词的用法 4.dare和need
need “需要” dare“敢” 可作情态动词也可作实义动词
• (2)当实义动词使用时，有人称和时态的变化 • e.g.You don't need to do it yourself. • He did not dare(to) look up.
• ——Can you drive a car at present? • ——I_____ do so in the busy street.
• A.may not C.daren't
B.don't dare D.needn't
二、情态动词的用法 ed to和had better
• (1)used to表示过去的习惯动作或状态，现 已不存在。
• e.g.There used to be our playground.
二、情态动词的用法 ed to和had better
time. • I'll not be able to come this afternoon.
二、情态动词的用法
• (2)表客观可能性，在疑问句中表示请求或许可 • e.g.Man can not live without air. • Can I use your pen?
• *could是can的过去时，主要用于疑问句，表示语气委婉。 • 肯定回答用 • 否定回答可用
C.should tell
D.should have told
二、情态动词的用法 7.will和would
(1)表意愿，用于各种人称的陈述句。
• e.g.I will do anything for you. • If you will read the book,I'll lend it to you.
情态动词详解公开课获奖课件
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二、表推测 。 也许性可分为客观也许性和详细事情实际发
生也许性两种。 所谓客观（理论）也许性即不包括详细某事
与否发生, 此种使用措施常常可以阐明人 或事物特性。 情态动词 can 可用于必然句中表达客观 / 理 论也许性, 而表达详细事情发生也许性时, can 一般不用 于必然句。
Accident can happen on such rainy days. （客观也许性）
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二、表推测 。 1. 也许性可分为客观也许性和详细事情实际发
生也许性两种。所谓客观（理论）也许性 即不包括详细某事与否发生, 此种使用措施 常常可以阐明人或事物特性。情态动词 can 可用于必然句中表达客观 / 理论也许性, 而表达详细事情发生也许性时, can 一般不 用于必然句。 Accident can happen on such rainy days. （客 观也许性） Peter may e with us tonight, but he isn’t sure yet. （实际也许性, 不用 can,而用 may.
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三、 “情态动词 + have done “ 使用措施一 览表
1. must have done 表达对过去已经发生行为进行推测, 意为 “想必 / 准是/ 一定做了某事
It must have rained last night, for the road was quite muddy.
情态动词在句中放在谓语动词之前，谓 语动词前若有助动词，则在助动词之前， 疑问句中， 情态动词放在主语之前。 I can see you. Come here. 我能看见你， 过来吧。 He must have been away. 他一定走了。 What can I do for you? 你要什么？ How dare you treat us like that! 你怎么 敢那样看待我们!
二、表推测 。 也许性可分为客观也许性和详细事情实际发
生也许性两种。 所谓客观（理论）也许性即不包括详细某事
与否发生, 此种使用措施常常可以阐明人 或事物特性。 情态动词 can 可用于必然句中表达客观 / 理 论也许性, 而表达详细事情发生也许性时, can 一般不用 于必然句。
Accident can happen on such rainy days. （客观也许性）
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二、表推测 。 1. 也许性可分为客观也许性和详细事情实际发
生也许性两种。所谓客观（理论）也许性 即不包括详细某事与否发生, 此种使用措施 常常可以阐明人或事物特性。情态动词 can 可用于必然句中表达客观 / 理论也许性, 而表达详细事情发生也许性时, can 一般不 用于必然句。 Accident can happen on such rainy days. （客 观也许性） Peter may e with us tonight, but he isn’t sure yet. （实际也许性, 不用 can,而用 may.
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三、 “情态动词 + have done “ 使用措施一 览表
1. must have done 表达对过去已经发生行为进行推测, 意为 “想必 / 准是/ 一定做了某事
It must have rained last night, for the road was quite muddy.
情态动词在句中放在谓语动词之前，谓 语动词前若有助动词，则在助动词之前， 疑问句中， 情态动词放在主语之前。 I can see you. Come here. 我能看见你， 过来吧。 He must have been away. 他一定走了。 What can I do for you? 你要什么？ How dare you treat us like that! 你怎么 敢那样看待我们!
情态动词公开课PPT课件
It’s too hot to take
exercise in the
afternoon.
Shall we do the training in the morning?
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shall: 1.Shall用于第一、第三人称疑问
句中，表示说话人征求对方的意 见、向对方请示或提供帮助 。
1.Shall we begin our lesson?
How delicious
!!!
You should not/ought not to
eat so much before running.
第31页/共47页
should:
1.Should表示劝告、建议、命令， 其同义词是ought to；在疑问句中， 通常用should代替ought…to。
Should I open the window? W ot我hee们srh.应ou当ld要le相ar互n 学fr习om。each
第20页/共47页
5.Making requests (提出要求):
informal
formal
will
can
could
would
I don’t know how to use this equipment!
Can you help me with my training?
第21页/共47页
6.Making suggestions (提出建议):
/No, you can’t/mustn’t.
第19页/共47页
may/might:
2.用于祈使句中表示祝愿。 May you be happy all your life.
Ma祝y你yo成u 功su！cceed. 3.表示推测、可能（只用于肯定句， 疑问句则要用can或could）。
exercise in the
afternoon.
Shall we do the training in the morning?
第22页/共47页
shall: 1.Shall用于第一、第三人称疑问
句中，表示说话人征求对方的意 见、向对方请示或提供帮助 。
1.Shall we begin our lesson?
How delicious
!!!
You should not/ought not to
eat so much before running.
第31页/共47页
should:
1.Should表示劝告、建议、命令， 其同义词是ought to；在疑问句中， 通常用should代替ought…to。
Should I open the window? W ot我hee们srh.应ou当ld要le相ar互n 学fr习om。each
第20页/共47页
5.Making requests (提出要求):
informal
formal
will
can
could
would
I don’t know how to use this equipment!
Can you help me with my training?
第21页/共47页
6.Making suggestions (提出建议):
/No, you can’t/mustn’t.
第19页/共47页
may/might:
2.用于祈使句中表示祝愿。 May you be happy all your life.
Ma祝y你yo成u 功su！cceed. 3.表示推测、可能（只用于肯定句， 疑问句则要用can或could）。
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1. When he was there, he ___ go to that coffee shop at the corner every day. A. would B. should C. had better D. might 2. —What’s the name of the book? —Khulaifi. _________ I spell it for you? A. Shall B. Would C. Can D. Might
may/ might表示推测
1. can not 不可能 may not 可能不
2. may well “极有可能” e.g. Liza may well not want to go on the trip --- she hates traveling. 3. may/ might as well “不妨” e.g. You may as well stay for dinner.
will would
1. 用于向第二人称，征求对方意见。 e.g. Would you please open the door? 2. 表示个人主观意愿。 e.g. I will help you anytime. 3. used to do “过去常常，强调现在不了” would表示“过去常常”；
5. Although this ____ sound like a simple task, great care is needed. A. must B. may C. shall D. should
情态动词+have done：表示对 过去发生的事进行推测
1. 2. 3. 4. 5. 6. must have done can/can’t have done could have done should have done needn’t have done might/may have done 一定做了… 可能/不可能做了… 本可以做… 本该做，而没做… 本不必做，而做了… 可能做了…
should / ought to表示推测
1. 根据经验的推测，“应当、应该” e.g. You photos should be ready by 12:00. 2. 表示“竟然”，带有感情色彩。 e.g. It is strange that you should like him.
can /could 表示s very happy. She __ have passed the exam. - I guess so. It’s not difficult after all. A. should B. could C. must D. might 2. She ___ have left school, for her bike is still here. A. can’t B. wouldn’t C. shouldn’t D. needn’t
3. - I’m sorry. I ___at you the other day. - Forget it. I was a bit out of control myself. A. shouldn’t shout B. shouldn’t have shouted C. mustn’t shout D. mustn’t have shouted
情态动词表请求、 情态动词表请求、允许
• shall • will、would 、
高考真题演练
shall
1. 用于第一、三人称 ，征求对方意见。 e.g. Shall we begin our class? Shall he go now? 2. 用于提出命令、允诺，或用于法律、规定 e.g. You shall get my book on Sunday. He shall leave the house at once. The sign reads: No person shall smoke here!
高中英语语法复习
岳阳县二中 胥玉
一、情态动词表能力
情态动词语法目录
（能够）
二、情态动词表请求、允许 （能不能） 三、情态动词表必要性 四、情态动词表推测
（必须） （可能）
五、情态动词+have done
情态动词表能力
1. I can/ am able to swim. 1. can 表示现在的能力 2. could表示过去的能力 2. I could/ was able to climb a tree when I 表示过去的能力 was a child. 3. be able to 表能力，可用于多种时态 表能力， 3. I will be able to swim next week. 4. be able to 强调成功地做了某事 4. The fire spread through the hotel very quickly but everyone was able to get out.
1. 常用于否定句或疑问句。 e.g. You can’t be hungry already — you had lunch only two hours ago! 2. can用于肯定句中表示理论上的可能性，并不 牵涉是否真的会发生 e.g. You can hurt yourself if you play in the street.
1. That be Ann’s husband, for I am sure that he doesn’t wear glasses. A. can’t B. may not C. mustn’t D. needn’t 2. - Good morning. I got an appointment with Miss Smith yesterday. - Ah, you ______ be Mr. Peter. A. might B. must C. would D. can
情态动词表必要性
• must • need 高考真题演练
must 表“必须”
1. 不必须 don’t have to needn’t do don’t need to
mustn’t 禁止
2. must还可表示“偏偏、偏要” e.g. Must you make so much noise?
1. You ___ buy a gift, but you can if you want to. A. must B. mustn’t C. have to D. don’t have to 2. When I was young, I was told that I ______ play with fire. A. wouldn't B. needn't C. mustn't D. daren't 3. - May I smoke here ? - If you __, choose a seat in the smoking area. A. should B. could C. may D. must
3. What do you mean, there are only ten tickets? There ______ be twelve. A. should B. would C. will D. shall
4. It is usually warm in my hometown in March, but it _____ be rather cold sometimes. A. must B. can C. should D. would
情态动词表推测
可能性的强弱层次 must ＞ should/ought to may/might
＞
can/could ＞
高考真题演练
must表示推测
1. 可能性最强，只能用于肯定句 e.g. That must be my pen. 2. must ---- 很可能 can’t ---- 不可能 e.g. That can’t be my pen.
4. You __ the exam, but you spent all your time playing. A. can pass B. could have passed C. could pass D. can have passed
5. - Catherine, I have cleaned the room for you. - Thanks. You ____ it. I could manage it myself. A. needn’t do B. needn’t have done C. mustn’t do D. shouldn’t have done 6. My MP4 isn’t in my bag. Where_____I have put it？ A. can B. must C. should D. would