Unit 2 Sporting events Grammar and usage(2)_ Modal verbs_ comparisons 课件（25张PPT）
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| 名称 | Unit 2 Sporting events Grammar and usage(2)_ Modal verbs_ comparisons 课件（25张PPT） |  | |
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| 科目 | 英语 | ||
| 更新时间 | 2020-01-09 22:48:30 | ||
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课件25张PPT。情态动词的用法 1. 情态动词表示说话人对_____________的态度，可以表示__________________________________等之意。
2. 情态动词没有________的变化。但不能__________动词用，必须和不带to的不定式连用构成谓语动词。只有情态动词ought要和带to的动词不定式连用，在句中作谓语用。
3. 将情态动词置于主语之前即构成其____，在情态动词之后加not既构成其________。 【情态动词的语法特征 】某一动作或状态“可能”、“可以”、“需要”、“必须”或“应当”人称和数单独作谓语疑问式否定式can could
may might
shall should
will would
must
ought todare (daren’t)
need (needn’t) modal verbs I.表示能力: can, could, be able to be able to 能用于各种时态。
can / could 只能表示现在或过去的能力。
was / were able to : “设法做成某事”
相当于 managed to do sth.
succeeded in doing sth.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
A 2. The fire spread through the hotel very quickly but everyone ______ get out.
A. had to B. would
C. could D. was able toDII.表示许可: may / might, can / could might, could 比较委婉, 一般多用于疑问句.
can, may 表达的语言比较随便.
在以could, might 表示征询对方意见或表示请求时，回答应相应使用can, may.
特殊用法：may/might well 很可能
may/might as well 不妨，最好1. — Could I borrow your dictionary?
— Yes, of course you _______.
A. might B. will
C. can D. should
2. — May I pick a flower in the garden?
—________.
A. No,you needn’t B. Not,please
C. No,you mustn’t D. No,you won’t
CCIII.表示推测——情态动词的重要用法.
can , could ,may ,might ,must 皆可用来表示推测，其用法如下： + V. + be doing + have done + V. + be doing + have done + V. + be doing + have done 可能，或许 肯定句,否定句 一定，必须 肯定句 可能，或许 否定句，疑问句 may/might特殊用法：can用在肯定句中，表示客观可能性高考考题:
1. I thought you _____like something to read, so
I have brought you some books.
A. may B. might C. would D. must
2. I didn’t hear the phone. I ___asleep
A. must be B. must have been
C. should be D. should have beenB B 3. ---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
4. It is usually warm in my hometown in March, but it ____ be rather cold sometimes.
A.must B.can C.should D.would D B 用can, could, may, might 填空：
1.---Is John coming by train?---He should, but ___________not. He likes driving his car.
2.Peter____________come with us tonight, but he isn’t sure yet.
3.Sorry I’m late. I ___________have turned off the alarm clock and gone back to sleep again.
4.That___________not be Mary. She is in hospital.
5.How _________you be so stupid?may/mightmightmay/mightcancanⅣ. 表示 必须、应该的情态动词的用法:
must ①表示“必须”、“应该”之意， 其意与have to相近。其否定式mustn‘t，表示“不准”、“不许可”或“禁止”之意.
特殊用法：must表示“偏要，非要”
②对以must提出的疑问句，如作否定回答时，要用needn‘t或用don’t (doesn‘t) have to (不 必)来回答，而不用mustn’t。
---- Must we finish the work tomorrow?
---- No, you ____________________ , but you _________finish?it in three days.needn't (don't have to)mustⅤ. shall和 should的用法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。例如： ??? Shall we begin our lesson?
2. shall用于第二、第三人称陈述句，表示说话人给对方的命令、警告、允诺或威胁．例如：
You shall fail if you don’t work harder．
He shall have the book when I finish reading．
He shall be punished. 警告允诺威胁should：
① should表示“建议”或“劝告”，有“应该”之意，与ought to 同义。ought to表示根据某种义务或必要“应当”做某事，语气比should强。在疑问句中，通常用should代替ought to。
②特殊用法：should表示“竟然”
③表示推测，注意与must表示推测时的区别：
He must be home by now .(断定他已到家)
He should/ought to be home by now .(不十分肯定) 1. 一What does the sign over there read?
一“No person ________ smoke or carry a lighted cigarette，cigar or pipe in this area.”
A．will B．may C．shall D. mustC2 --- I think I’ll give Bob a ring.
--- You ___. You haven’t been in touch with him for ages.
A. will B. may C. have to D. shouldD3. --- When can I come for the photos? I need them tomorrow afternoon.
---They _____ be ready by 12:00.
A. must B. should C. may D. need
B1.表意愿：
If you will wait, the manager will be here soon.
If you will take off your clothes, we will try the new clothes on you in front of the mirror.
2.表请求: Will you please… ?
3.特殊用法：表习惯性动作:
Fish _______die without water.
Whenever he meets me, he ___________over and say hello to me. VI. will和would用法willwillwill come
① would可表示过去反复发生的动作或某种倾向，有“总是、总会”等意思。would表过去习惯时比used to正式，并没有“现已无此习惯”的含义。例如：
During the vacation he would visit me every week．
②在疑问句中，用于第二人称，表示说话人向对方提出请求或许问对方的意愿时，比用will的气更加婉转，如：
Would you like some more coffee? would情态动词 (+动词原形)行为动词 needdare多用与否定句,疑问句，或条件句中; 常以needn’t 和daren’t
的形式出现;dare有其过去时dared. 多用于肯定句
need to do
dare to do
Ⅶ.可兼做行为动词的情态动词：need 、 dare判断正误:
How dare you say such a thing?
He daren’t to speak English
before such a crowd, did he?
Nobody need be afraid of catching
the disease.
These dishes needed be cleaned carefully.1.They ________ to walk in the street at night.
A. didn’t dare B. not dared
C. not dare D. dared not
2.I dare to climb that tall tree over there, but ____ ?
A. dare you B. do you
C. are you D. would you
3. You ______ return the book now. You can
keep it till next week if you like.
A. can’t B. mustn’t C. needn’t D. may notABC1. must have done3. may have done/ might have done4. need’t have done5. should have done/ shouldn’t have done
6. could have done
7. would have done / wouldn’t have done2. can’t have done/ couldn’t have doneVIII. 情态动词+ have +过去分词1.---Guess what! I have got A for my term paper.
---Great! You _____read widely and put a lot of work into it.
A. must B. should
C. must have D. should have
2.The plant is dead. I _____ it more water.
A. should have given B. will give
C. would give D. must give
3.--- I stayed at a hotel while in New York.
--- Oh, did you? You _____with Barbara.
A. could have stayed B. could stay
C. would stay D. must have stayed CAA4.Why didn’t you tell me there was no meeting today? I _____ all the way here through the heavy snow.
A. needn’t have driven B. can’t have driven
C. must have driven D. shouldn’t have driven
5. ---I wonder why Mr. Lin didn’t come to work.
---He ________ have been ill.
A. needn’t B. should C. might D. can
6.---We didn’t see him at the lecture.
---Neither did anybody else. He ________ it.
A. may not have attended B. mustn’t attend
C. shouldn’t have attended D. couldn’t have attendedACD1-5 BBCCB
6-10 BCBBC
11-15 DBDDC
16-20 CABAB
2. 情态动词没有________的变化。但不能__________动词用，必须和不带to的不定式连用构成谓语动词。只有情态动词ought要和带to的动词不定式连用，在句中作谓语用。
3. 将情态动词置于主语之前即构成其____，在情态动词之后加not既构成其________。 【情态动词的语法特征 】某一动作或状态“可能”、“可以”、“需要”、“必须”或“应当”人称和数单独作谓语疑问式否定式can could
may might
shall should
will would
must
ought todare (daren’t)
need (needn’t) modal verbs I.表示能力: can, could, be able to be able to 能用于各种时态。
can / could 只能表示现在或过去的能力。
was / were able to : “设法做成某事”
相当于 managed to do sth.
succeeded in doing sth.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
A 2. The fire spread through the hotel very quickly but everyone ______ get out.
A. had to B. would
C. could D. was able toDII.表示许可: may / might, can / could might, could 比较委婉, 一般多用于疑问句.
can, may 表达的语言比较随便.
在以could, might 表示征询对方意见或表示请求时，回答应相应使用can, may.
特殊用法：may/might well 很可能
may/might as well 不妨，最好1. — Could I borrow your dictionary?
— Yes, of course you _______.
A. might B. will
C. can D. should
2. — May I pick a flower in the garden?
—________.
A. No,you needn’t B. Not,please
C. No,you mustn’t D. No,you won’t
CCIII.表示推测——情态动词的重要用法.
can , could ,may ,might ,must 皆可用来表示推测，其用法如下： + V. + be doing + have done + V. + be doing + have done + V. + be doing + have done 可能，或许 肯定句,否定句 一定，必须 肯定句 可能，或许 否定句，疑问句 may/might特殊用法：can用在肯定句中，表示客观可能性高考考题:
1. I thought you _____like something to read, so
I have brought you some books.
A. may B. might C. would D. must
2. I didn’t hear the phone. I ___asleep
A. must be B. must have been
C. should be D. should have beenB B 3. ---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
4. It is usually warm in my hometown in March, but it ____ be rather cold sometimes.
A.must B.can C.should D.would D B 用can, could, may, might 填空：
1.---Is John coming by train?---He should, but ___________not. He likes driving his car.
2.Peter____________come with us tonight, but he isn’t sure yet.
3.Sorry I’m late. I ___________have turned off the alarm clock and gone back to sleep again.
4.That___________not be Mary. She is in hospital.
5.How _________you be so stupid?may/mightmightmay/mightcancanⅣ. 表示 必须、应该的情态动词的用法:
must ①表示“必须”、“应该”之意， 其意与have to相近。其否定式mustn‘t，表示“不准”、“不许可”或“禁止”之意.
特殊用法：must表示“偏要，非要”
②对以must提出的疑问句，如作否定回答时，要用needn‘t或用don’t (doesn‘t) have to (不 必)来回答，而不用mustn’t。
---- Must we finish the work tomorrow?
---- No, you ____________________ , but you _________finish?it in three days.needn't (don't have to)mustⅤ. shall和 should的用法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。例如： ??? Shall we begin our lesson?
2. shall用于第二、第三人称陈述句，表示说话人给对方的命令、警告、允诺或威胁．例如：
You shall fail if you don’t work harder．
He shall have the book when I finish reading．
He shall be punished. 警告允诺威胁should：
① should表示“建议”或“劝告”，有“应该”之意，与ought to 同义。ought to表示根据某种义务或必要“应当”做某事，语气比should强。在疑问句中，通常用should代替ought to。
②特殊用法：should表示“竟然”
③表示推测，注意与must表示推测时的区别：
He must be home by now .(断定他已到家)
He should/ought to be home by now .(不十分肯定) 1. 一What does the sign over there read?
一“No person ________ smoke or carry a lighted cigarette，cigar or pipe in this area.”
A．will B．may C．shall D. mustC2 --- I think I’ll give Bob a ring.
--- You ___. You haven’t been in touch with him for ages.
A. will B. may C. have to D. shouldD3. --- When can I come for the photos? I need them tomorrow afternoon.
---They _____ be ready by 12:00.
A. must B. should C. may D. need
B1.表意愿：
If you will wait, the manager will be here soon.
If you will take off your clothes, we will try the new clothes on you in front of the mirror.
2.表请求: Will you please… ?
3.特殊用法：表习惯性动作:
Fish _______die without water.
Whenever he meets me, he ___________over and say hello to me. VI. will和would用法willwillwill come
① would可表示过去反复发生的动作或某种倾向，有“总是、总会”等意思。would表过去习惯时比used to正式，并没有“现已无此习惯”的含义。例如：
During the vacation he would visit me every week．
②在疑问句中，用于第二人称，表示说话人向对方提出请求或许问对方的意愿时，比用will的气更加婉转，如：
Would you like some more coffee? would情态动词 (+动词原形)行为动词 needdare多用与否定句,疑问句，或条件句中; 常以needn’t 和daren’t
的形式出现;dare有其过去时dared. 多用于肯定句
need to do
dare to do
Ⅶ.可兼做行为动词的情态动词：need 、 dare判断正误:
How dare you say such a thing?
He daren’t to speak English
before such a crowd, did he?
Nobody need be afraid of catching
the disease.
These dishes needed be cleaned carefully.1.They ________ to walk in the street at night.
A. didn’t dare B. not dared
C. not dare D. dared not
2.I dare to climb that tall tree over there, but ____ ?
A. dare you B. do you
C. are you D. would you
3. You ______ return the book now. You can
keep it till next week if you like.
A. can’t B. mustn’t C. needn’t D. may notABC1. must have done3. may have done/ might have done4. need’t have done5. should have done/ shouldn’t have done
6. could have done
7. would have done / wouldn’t have done2. can’t have done/ couldn’t have doneVIII. 情态动词+ have +过去分词1.---Guess what! I have got A for my term paper.
---Great! You _____read widely and put a lot of work into it.
A. must B. should
C. must have D. should have
2.The plant is dead. I _____ it more water.
A. should have given B. will give
C. would give D. must give
3.--- I stayed at a hotel while in New York.
--- Oh, did you? You _____with Barbara.
A. could have stayed B. could stay
C. would stay D. must have stayed CAA4.Why didn’t you tell me there was no meeting today? I _____ all the way here through the heavy snow.
A. needn’t have driven B. can’t have driven
C. must have driven D. shouldn’t have driven
5. ---I wonder why Mr. Lin didn’t come to work.
---He ________ have been ill.
A. needn’t B. should C. might D. can
6.---We didn’t see him at the lecture.
---Neither did anybody else. He ________ it.
A. may not have attended B. mustn’t attend
C. shouldn’t have attended D. couldn’t have attendedACD1-5 BBCCB
6-10 BCBBC
11-15 DBDDC
16-20 CABAB