情态动词全部ppt课件

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Some festivals are held to satisfy the ancestors, who might return either to help or to do harm.
推测
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--- Excuse me. Is this the right way to the Summer Palace?
3. will/would
1. 表示意愿，will表示现在的意愿， would表示过去的意愿。
I will stick to my plan though all of you are against it.
I told him to give up smoking, but he wouldn’t
3. During the vacation, he would visit me
every four days.
过去的习惯
4. Will / Would you pass me the ball,
please?
请求
习惯，倾向 5. Birds will fly to the south in the winter. 24
You can go with them if you like.
--- Could/Can I have a look at your new design? --- Yes, of course you can.
(注意此处答语不能用could)
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3）用在肯定句中，表示_客__观__上__有__可_ 能 Anybody can make mistakes. Driving on the snowy roads can be very dangerous.
Fish will die without water. When he was a child, he would often go skiing.
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1.I will never do that again.意愿
2. They asked him if he would go abroad. 意愿
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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
2. The fire spread through the hotel very quickly
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2）shall用于第二、第三人称的陈述句，表示 说话人给对方的许诺、命令、警告、威胁等。
Tell Jack he shall get a gift if he performed
well.
(许诺)
You shall fail if you don’t work hard. (警告)
You shall be punished if you break the
2023最新整理收集 do
something
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情态动词的语法特征
1. 情态动词有词义吗？ 2. 情态动词有人称和数的变化吗？ 3.情态动词有时态吗？ 4.情态动词能单独做谓语吗？
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情态动词的语法特征
1. 情态动词有一定的词义，表示某种情绪或 态度，表示可能、愿望、必要、允许、能力等。
2. 情态动词没有人称和数的变化，即不随主语的不 同而变化。
It may be true. He might not come today.
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(3) 表示愿望
• May the new year bring you peace, joy and happiness. 祝你旅行开心！ •May you have a good journey! 祝你成功！ May you succeed!
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4）表示主观的_猜__测__，主要用在否定句和疑 问句中。
表示推测时，could不是过去式，只是语气更委 婉 It can’t be Mary. She is in Shanghai now.
It couldn’t be Dad. He won’t be back this time of evening.
--- Sorry, I am not sure, but it ____be. A. might B will C. must D. can
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• --- Are you coming to Jeff's party?
--- I'm not sure. I ________go to the
concert instead.
progress in study. 承诺 They shall get what they want if they keep their word. Nothing shall stop us from carrying out the plan.决心 27
3）shall用于第三人称，用于叙述条约、规定、 法律等文件.
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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如： _____ you understand the meaning of this sentence? In the fire, he _________ escape from the burning building.
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2）表示请求和允许。
表示请求，口语中常用could代替can， 使语气更委婉。
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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.
It’s already 10. She promised to come by 10. She should turn up at any moment.
--- Shall I go and buy more fruits for the party? --- No, I have already bought 3 baskets. That
• C. can D. could
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4. Mary _____ speak three languages. 能力
5. Children ____ dress up and go to their neighbours’ homes to ask for sw accidents _____ happen in such
collected. There is a rule that students shall wear uniform. I tell you that you shall regret some day. 警告 He shall fall behind if he is always so lazy. He shall be punished if he insists on doing that You shall have a nice present for your birthday if you make
Those belonging to our club shall wear uniforms. 我们俱乐部的成员都应该穿制服。
--- What does the sign over there read? --- “No person ________ smoke in this area.”
A．will B．may C．shall D. must
but everyone ______ get out.
A. had to
B. would
C. could
D. was able to
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3. ---Could I borrow your dictionary? ---Yes, of course you________ A. might B. will
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。
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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1. can / could
1) 表示能力。意思为“能够、会”， could表示过去的能力，can表示现在的能 力。 He could play the piano at the age of 6. A computer can't think for itself.
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表示能力: can, could, be able to
snowy weather.
客观上的可能性
7. It _____ be Mary. She has fallen ill. 推测
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2. may / might
1)表示允许，许可，might用于过去时
He said I might use his pen. 表许可时，等同
于can/could
May I come in?
listen.
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2.用于第二人称表示请求、建议等， would比will语气委婉、客气。
Will you type this, please? Would you please open the window? 肯定答语 ---Yes, you will./No problem./
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3. 表示习惯和倾向性 will表示现在的习惯，would表示过去的习 惯(=used to do)。
--- May I borrow your bike?
肯定答语 ---Yes, you may./You can./ Certainly./Sure.
否定答语 --- No, you mustn’t./No, you can't./You'd better not.
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2)表示主观的可能性，might比may可能性更小。
____ be enough. A. can B. should C. may D. might
1)时态上：be able to 能用于各种时态。 can / could 只能表示现在或过 去的能力。
2)意义上：can / could表示个人有某种能力
was / were able to : 表示某人通过努力 克服困难做成某事“设法做成某事”
相当于：managed to do sth. succeeded in doing sth.。
4. 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或向对方请示。
Shall we put off the sports meet until next week? Shall we go by train?
Henry is waiting outside. Shall he come in, sir?
It is a wonder that rice should grow in the desert. You should make friends with such a selfless person. How should I know who he likes？
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3）表示推测，译作“应该”“理应”。