《情态动词课件》ppt课件
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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；
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).
5
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
11
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和和might表示现在或将来可能发生的动作或情况主要用于肯定句中表示现在或将来可能发生的动作或情况主要用于肯定句中might相对于may来说表示的可能性更小一些
情态动词概述
情态动词表示说话人的语气或对事物的态度， 情态动词本身有词义，但不能单独作谓语，必须和 原形动词一起构成谓语。情态动词没有人称和数的 形式变化。 英语情态动词共有9种，即 can,may,will,shall,dare.must,need,ought to,used to.有 的情态动词有时态的变化。变化如下：
18
(04全国卷II) C be tired — you’ve only been You ____ working for an hour. A. must not B. won’t C. can’t D. may not (06全国卷I) A at home. There is no light on — They ____ A. can’t B. mustn’t C. needn’t D. shouldn’t
28
坚决拒绝。
I won’t listen to your nonsense. The dog wouldn’t stop barking.
或情况，主要用于肯定句中，might相对于may 来说，表示的可能性更小一些。
4
二.情态动词+have done
表示对过去所发生事情的推测或带有某
种语气. 1. I didn’t hear the phone. I must have been asleep. must have done (过去)肯定/一定… (用于肯定句中)
(00 上海)
My sister met him at the Grand A Theatre yesterday, so he ______ your lecture. A. couldn’t have attended
B. needn’t have attended C. mustn’t have attended D. shouldn’t have attended
6
3. ● He may not have finished the exercises, I’m afraid. may/might have done(过去) 或许/可能做 …(用于肯定或否定句中) 4. You could have done better, but you didn’t try your best. could have done (过去) 本能够做 (用于肯定或否定句中,带有责备、劝告之意)
24
Could 表可能性,语气较弱; 表请求,较委婉。 —Could you lend me some money? —Yes , I can. (98 上海) “ Could I call you by your first name?” C “ Yes, you _____. A. will B. could C. may D. might
27
Will/Would
意志、愿望和决心。 1)I will never do that again. 2)If you will wait over for a long time, Mr. Smith, I will tell our manager you’ve arrived. 习惯、倾向，多用于第三人称。 He will sit there hour after hour doing nothing. Boys will be boys.
20
Can
在肯定句中使用表示 1)有时候的可能性: ● The World Wide Web is sometimes jokingly called the World Wide Wait because it can be slow.(05浙江). ●He can be friendly at times.
25
able to 和 could 的区别 The fire spread through the hotel very quickly, but every one was able to get out. （强调经过一番努力后成功 做到某事. ＊He didn’t agree with me at first, but I was able to persuade him. ＊She could sing when she was young. (一般能力)
19
(06福建） If it weren’t for the fact that she ____ sing, I would invite her to the party. A. couldn’t B. shouldn’t C. can’t D. might not (06四川） —Is Jack on duty today? —It ____ be him. It’s his turn tomorrow. A. mustn’t B. won’t C. can’t D. needn’t
3
情态动词可用来表示推测,语气从强到弱的顺序是： must，should，can，could, may ，might。
一.情态动词表示推测的用法
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表示现在或将来可能发生的动作
8
6.She shouldn’t have taken away my tape, for I wanted to use it.
should /ought to have done (过去)本应该做(而实际上未做),用于否定句 时则表示过去不该做的事反而做了 (带有后悔、埋怨或责备的语气）。
9
10
15
三.情态动词基本用法
Must 必须
(04 上海)
Children under 12 years of age in that country must be under adult supervision when in a public library.
16
Can/Could
用在否定句、疑问句、感叹句中常表推
21
2) 理论上的可能性,并不涉及具体某事是否真 会发生,主要是说明人和事物的特征: 1.Even expert drivers can make mistakes. 2.(2003) A left-luggage office is a place where bags can be left for a short time, especially at a railway station. 3. Training by yourself in a gym can be highly dangerous. 4. Bird Flu can be dangerous.
测、惊讶、怀疑、不相信的语气： 1）— Who can it be? — It can’t be him. He has gone to Xi’an. 2）How can you be so careless? What can he possibly mean?
17
(03上海)
A you say that you really How _____ understand the whole story if you have covered only part of the article. A. can B. must C. need D. may
12
(05福建) —Catherine, I have cleaned the room for you. B it. I could —Thanks. You ____ manage it myself. A. needn’t do B. needn’t have done C. mustn’t do D. shouldn’t have done
22
C difficult, Making choices ____ especially when there is no one to turn to for advice. A. might B. should D. must
23
但是在表达具体某事实际发生的可能性
时不可用can, 用may/might/could. 1) He may /might / could be in the library. 2)A snowstorm can be exciting, but too much snow can cause trouble. 3) This storm may/might/could last several days.
13
(NMET 05)
B He ______ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside. B. must A. should C. wouldn’t D. can’t
14
was
26
Can的惯用语 1.can’t (help/choose) but + v (不得不） I can’t help but admire your bravery. 2. can’t help doing.区别 /can’t help (to) do. 3. can’t help it. “ Why are you crying?” “ I just can’t help it. 4. can’t/ couldn’t 与too, enough连用. You can’t be too careful. 再…也不过分 I can’t thank you too much.
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).
5
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
11
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和和might表示现在或将来可能发生的动作或情况主要用于肯定句中表示现在或将来可能发生的动作或情况主要用于肯定句中might相对于may来说表示的可能性更小一些
情态动词概述
情态动词表示说话人的语气或对事物的态度， 情态动词本身有词义，但不能单独作谓语，必须和 原形动词一起构成谓语。情态动词没有人称和数的 形式变化。 英语情态动词共有9种，即 can,may,will,shall,dare.must,need,ought to,used to.有 的情态动词有时态的变化。变化如下：
18
(04全国卷II) C be tired — you’ve only been You ____ working for an hour. A. must not B. won’t C. can’t D. may not (06全国卷I) A at home. There is no light on — They ____ A. can’t B. mustn’t C. needn’t D. shouldn’t
28
坚决拒绝。
I won’t listen to your nonsense. The dog wouldn’t stop barking.
或情况，主要用于肯定句中，might相对于may 来说，表示的可能性更小一些。
4
二.情态动词+have done
表示对过去所发生事情的推测或带有某
种语气. 1. I didn’t hear the phone. I must have been asleep. must have done (过去)肯定/一定… (用于肯定句中)
(00 上海)
My sister met him at the Grand A Theatre yesterday, so he ______ your lecture. A. couldn’t have attended
B. needn’t have attended C. mustn’t have attended D. shouldn’t have attended
6
3. ● He may not have finished the exercises, I’m afraid. may/might have done(过去) 或许/可能做 …(用于肯定或否定句中) 4. You could have done better, but you didn’t try your best. could have done (过去) 本能够做 (用于肯定或否定句中,带有责备、劝告之意)
24
Could 表可能性,语气较弱; 表请求,较委婉。 —Could you lend me some money? —Yes , I can. (98 上海) “ Could I call you by your first name?” C “ Yes, you _____. A. will B. could C. may D. might
27
Will/Would
意志、愿望和决心。 1)I will never do that again. 2)If you will wait over for a long time, Mr. Smith, I will tell our manager you’ve arrived. 习惯、倾向，多用于第三人称。 He will sit there hour after hour doing nothing. Boys will be boys.
20
Can
在肯定句中使用表示 1)有时候的可能性: ● The World Wide Web is sometimes jokingly called the World Wide Wait because it can be slow.(05浙江). ●He can be friendly at times.
25
able to 和 could 的区别 The fire spread through the hotel very quickly, but every one was able to get out. （强调经过一番努力后成功 做到某事. ＊He didn’t agree with me at first, but I was able to persuade him. ＊She could sing when she was young. (一般能力)
19
(06福建） If it weren’t for the fact that she ____ sing, I would invite her to the party. A. couldn’t B. shouldn’t C. can’t D. might not (06四川） —Is Jack on duty today? —It ____ be him. It’s his turn tomorrow. A. mustn’t B. won’t C. can’t D. needn’t
3
情态动词可用来表示推测,语气从强到弱的顺序是： must，should，can，could, may ，might。
一.情态动词表示推测的用法
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表示现在或将来可能发生的动作
8
6.She shouldn’t have taken away my tape, for I wanted to use it.
should /ought to have done (过去)本应该做(而实际上未做),用于否定句 时则表示过去不该做的事反而做了 (带有后悔、埋怨或责备的语气）。
9
10
15
三.情态动词基本用法
Must 必须
(04 上海)
Children under 12 years of age in that country must be under adult supervision when in a public library.
16
Can/Could
用在否定句、疑问句、感叹句中常表推
21
2) 理论上的可能性,并不涉及具体某事是否真 会发生,主要是说明人和事物的特征: 1.Even expert drivers can make mistakes. 2.(2003) A left-luggage office is a place where bags can be left for a short time, especially at a railway station. 3. Training by yourself in a gym can be highly dangerous. 4. Bird Flu can be dangerous.
测、惊讶、怀疑、不相信的语气： 1）— Who can it be? — It can’t be him. He has gone to Xi’an. 2）How can you be so careless? What can he possibly mean?
17
(03上海)
A you say that you really How _____ understand the whole story if you have covered only part of the article. A. can B. must C. need D. may
12
(05福建) —Catherine, I have cleaned the room for you. B it. I could —Thanks. You ____ manage it myself. A. needn’t do B. needn’t have done C. mustn’t do D. shouldn’t have done
22
C difficult, Making choices ____ especially when there is no one to turn to for advice. A. might B. should D. must
23
但是在表达具体某事实际发生的可能性
时不可用can, 用may/might/could. 1) He may /might / could be in the library. 2)A snowstorm can be exciting, but too much snow can cause trouble. 3) This storm may/might/could last several days.
13
(NMET 05)
B He ______ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside. B. must A. should C. wouldn’t D. can’t
14
was
26
Can的惯用语 1.can’t (help/choose) but + v (不得不） I can’t help but admire your bravery. 2. can’t help doing.区别 /can’t help (to) do. 3. can’t help it. “ Why are you crying?” “ I just can’t help it. 4. can’t/ couldn’t 与too, enough连用. You can’t be too careful. 再…也不过分 I can’t thank you too much.