高中英语情态动词课件.ppt
light has been turned off.
must
2. 表示“坚持”(常用于固定句型:if you must do sth. 如果你非得要做某事)
如果你真的要走,那就悄悄离开。
If you must leave, do it quietly.
• 3.must 做必须讲时,其疑问句的否定回答 用needn't,表示不必,mustn't表示不准 ,禁止。
sБайду номын сангаасconds ago.
A.may
B.might C.must
must
1. must 表示肯定的猜测,译为“一定”, 只能用于肯定句,在疑问句和否定句中表 推测时分别要用can/could和 can't/couldn't。
This must be your pen. He must be doing his homework now. He can't be in the classroom, for the
very uncertain
almost certain
might may could (can) should ought to will must
1.He _____ be at home.
A.may
B.might C.must
2.He _____ be at home, for he
just called me from his home 15
can/could:
2.在疑问句中,用could可表示请 求,语气较委婉。
He asks if he c_o_u_l_d smoke here. — C_o_u_ld_I have the television on?
— Yes, you _c_an_/_m_a.y / No, you _ca_n_’t_/_I’m afraid not
二. We use modal verbs to talk
about:
1. Ability
(能力)
2. Obligation (义务)
3. Certainty (可能性)
4. Permission (允许)
.We also use modal verbs to:
5. Make requests(提出请求) 6. Make suggestions(提出
一.What are modal verbs?
• 情态动词用在行为动词前,表示说话人对 这一动作或状态的态度,看法或主观设想. 但本身词义不完全,不能单独作谓语,只 能和动词原形一起构成谓语。情态动词一 般没有人称和数的变化。 情态动词虽然数 量不多,但用途广泛,主要有下列: can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would) must not ,have to.
A.can B.may C.have to D.must
have to
• 1.have to 表示一种客观的需要,即周围的 环境、状况等要求或迫使某人不得不做某 事。
• It's raining outside, so I have to put on my raincoat to go out.
can/could: 4. can never/can’t……too表示 “无论怎样…也不过分”,“越…越
好”You。can’t be too careful 你(过/马ca路r的ef时ul候e再no小ug心h也)不w为h过ile。
crossing the street.
can/be able to区别:
Edison always wondered why hens could hatch (孵) chickens
while he was not able to.
Question: Are the two modal verbs interchangeable (互换) ? If not, why?
• 2. have to 的否定式don't have to,相当于 needn't,表示没有义务或没必要做某事, 意为不必,常用于回答must引导的疑问句 。
• Must I turn in my homework now? • -Yes, you must/ have to. • -No, you needn't /don't have to.
can/could:
3.表示惊异、怀疑、不相信的态度。(主 要用在否定句、疑问句或感叹句中)
Can this be true?
He’s such a nice person that
he _c_a_n_’_t_ commit the crime!
你Ho怎w么ca会n 如yo此u b地e粗so心c!areless!
can表示与生俱来的能力或一种客观可能,而 be able to更加强调通过后天的学习和努力获 得的能力,或者在某个客观的场合和背景下, 能做到的事情。
advisability
necessity
ought to/should
have to
must
Your mother brings you up and takes good care of you, so when she is old, you ___ look after her in return.
建议或意见) 7. Make offers(提供帮助)
1.Ability(能力)——can/could:
1). can 一般表示与生俱来的能力 或者一种客观可能性,还可以表示 请求和允许 。
Man can not live without air.
Learning English _c_a_n__ be difficult. __C_a_n___ I use your bike?
• -Must I work out the problem tonight?
• -No, you needn't.
• It's my car. You mustn't use it without my permission.
4.Permission(允许) may/might:
must
2. 表示“坚持”(常用于固定句型:if you must do sth. 如果你非得要做某事)
如果你真的要走,那就悄悄离开。
If you must leave, do it quietly.
• 3.must 做必须讲时,其疑问句的否定回答 用needn't,表示不必,mustn't表示不准 ,禁止。
sБайду номын сангаасconds ago.
A.may
B.might C.must
must
1. must 表示肯定的猜测,译为“一定”, 只能用于肯定句,在疑问句和否定句中表 推测时分别要用can/could和 can't/couldn't。
This must be your pen. He must be doing his homework now. He can't be in the classroom, for the
very uncertain
almost certain
might may could (can) should ought to will must
1.He _____ be at home.
A.may
B.might C.must
2.He _____ be at home, for he
just called me from his home 15
can/could:
2.在疑问句中,用could可表示请 求,语气较委婉。
He asks if he c_o_u_l_d smoke here. — C_o_u_ld_I have the television on?
— Yes, you _c_an_/_m_a.y / No, you _ca_n_’t_/_I’m afraid not
二. We use modal verbs to talk
about:
1. Ability
(能力)
2. Obligation (义务)
3. Certainty (可能性)
4. Permission (允许)
.We also use modal verbs to:
5. Make requests(提出请求) 6. Make suggestions(提出
一.What are modal verbs?
• 情态动词用在行为动词前,表示说话人对 这一动作或状态的态度,看法或主观设想. 但本身词义不完全,不能单独作谓语,只 能和动词原形一起构成谓语。情态动词一 般没有人称和数的变化。 情态动词虽然数 量不多,但用途广泛,主要有下列: can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would) must not ,have to.
A.can B.may C.have to D.must
have to
• 1.have to 表示一种客观的需要,即周围的 环境、状况等要求或迫使某人不得不做某 事。
• It's raining outside, so I have to put on my raincoat to go out.
can/could: 4. can never/can’t……too表示 “无论怎样…也不过分”,“越…越
好”You。can’t be too careful 你(过/马ca路r的ef时ul候e再no小ug心h也)不w为h过ile。
crossing the street.
can/be able to区别:
Edison always wondered why hens could hatch (孵) chickens
while he was not able to.
Question: Are the two modal verbs interchangeable (互换) ? If not, why?
• 2. have to 的否定式don't have to,相当于 needn't,表示没有义务或没必要做某事, 意为不必,常用于回答must引导的疑问句 。
• Must I turn in my homework now? • -Yes, you must/ have to. • -No, you needn't /don't have to.
can/could:
3.表示惊异、怀疑、不相信的态度。(主 要用在否定句、疑问句或感叹句中)
Can this be true?
He’s such a nice person that
he _c_a_n_’_t_ commit the crime!
你Ho怎w么ca会n 如yo此u b地e粗so心c!areless!
can表示与生俱来的能力或一种客观可能,而 be able to更加强调通过后天的学习和努力获 得的能力,或者在某个客观的场合和背景下, 能做到的事情。
advisability
necessity
ought to/should
have to
must
Your mother brings you up and takes good care of you, so when she is old, you ___ look after her in return.
建议或意见) 7. Make offers(提供帮助)
1.Ability(能力)——can/could:
1). can 一般表示与生俱来的能力 或者一种客观可能性,还可以表示 请求和允许 。
Man can not live without air.
Learning English _c_a_n__ be difficult. __C_a_n___ I use your bike?
• -Must I work out the problem tonight?
• -No, you needn't.
• It's my car. You mustn't use it without my permission.
4.Permission(允许) may/might:
合集下载
高中英语情态动词Model Verbs[教学课件]练习充分
表客观“可能” 表主观“可能” •may ______________ can____________ 不可能 可能不 •Cannot___________ may not__________
A
4 should. We should be strict with ourselves. 表劝告和建议应该 You should keep your promise. 表推测,“可能,应该” They should have arrived by two o’clock.
Modal Verbs
情态动词
情态动词是中学英语学习中的一个
重点和难点,也是高考的重点考察 内容之一。 根据对历年来试题的分 析,高考的热点依次是:
1.)推测和可能性;
2.)情态动词+have done;
3.)虚拟语气; 4.)shall, should, can 和must 表特定 语气.
1.情态动词主要有: can, could, may, might, must, ought to, shall, should, will, would, need, dare,had better, etc.
1. can和could Some of us can use the computer now, but we couldn’t last year. 表示“能力” It will be sunny in the daytime, but it could rain later on this evening. 表示“客观可能性”
• 5.shall与should • --Excuse me, but I want to use your computer to type a report. • --You ____ have my computer if you A don’t take care of it. • A. shan’t B. might not • C. needn’t D. shouldn’t
A
4 should. We should be strict with ourselves. 表劝告和建议应该 You should keep your promise. 表推测,“可能,应该” They should have arrived by two o’clock.
Modal Verbs
情态动词
情态动词是中学英语学习中的一个
重点和难点,也是高考的重点考察 内容之一。 根据对历年来试题的分 析,高考的热点依次是:
1.)推测和可能性;
2.)情态动词+have done;
3.)虚拟语气; 4.)shall, should, can 和must 表特定 语气.
1.情态动词主要有: can, could, may, might, must, ought to, shall, should, will, would, need, dare,had better, etc.
1. can和could Some of us can use the computer now, but we couldn’t last year. 表示“能力” It will be sunny in the daytime, but it could rain later on this evening. 表示“客观可能性”
• 5.shall与should • --Excuse me, but I want to use your computer to type a report. • --You ____ have my computer if you A don’t take care of it. • A. shan’t B. might not • C. needn’t D. shouldn’t
高中英语课件专题七 情态动词与虚拟语气
尽管这场大火迅速蔓延到了这个宾馆,但是每个人都逃 了出去。(表示过去有能力做并且成功地做了)
I could have worked out the problem, but I was too nervous.
我本来可以解出这道题,但我太紧张了。(表示本来有能 力做但未做)
2.表示推测(可能性) 可能性可分为客观的可能性和具体事情实际发生的可能性 两种。 (1)客观的可能性并不表示具体某事是否会发生,而用来说. 明.人.或.事.物.的.特.征.。情态动词 can 可用于肯定句中表示客观的(或 理论的)可能性,而表示具体事情实际发生的可能性时, can 一 般不用于肯定句。
(2)表示具体事情实际发生的可能性
表示具体事情实际发生的可能性的层次(由强及弱)比较:
词形
肯定式
否定式
疑问式
must
必定,必然
/
/
should
按说应该
应该不会
/
ought to can could
按说应该 /微弱的可能应该不会 不可能 不可能
/ 有可能吗? 语气比can弱
或许,也许,也说 may 不定
专题七 情态动词与虚拟语气
情态动词的基本用法
情态动词具有一定的词义,没有人称和数的变化,必须和
其他动词一起构成谓语,用来表示愿望、态度或推测等。
1.表示能力
(1)表示现在的能力caamn/is/are able to (2)表示将来的能力:will be able to (3)表示过去的能力
Don't worry. Your father may not have been hurt seriously.
别担心,你父亲也.许.伤得不.厉害。 There shouldn't be any difficulty in getting you a visa. 给你弄个签证应.该.不.会.有什么困难。
I could have worked out the problem, but I was too nervous.
我本来可以解出这道题,但我太紧张了。(表示本来有能 力做但未做)
2.表示推测(可能性) 可能性可分为客观的可能性和具体事情实际发生的可能性 两种。 (1)客观的可能性并不表示具体某事是否会发生,而用来说. 明.人.或.事.物.的.特.征.。情态动词 can 可用于肯定句中表示客观的(或 理论的)可能性,而表示具体事情实际发生的可能性时, can 一 般不用于肯定句。
(2)表示具体事情实际发生的可能性
表示具体事情实际发生的可能性的层次(由强及弱)比较:
词形
肯定式
否定式
疑问式
must
必定,必然
/
/
should
按说应该
应该不会
/
ought to can could
按说应该 /微弱的可能应该不会 不可能 不可能
/ 有可能吗? 语气比can弱
或许,也许,也说 may 不定
专题七 情态动词与虚拟语气
情态动词的基本用法
情态动词具有一定的词义,没有人称和数的变化,必须和
其他动词一起构成谓语,用来表示愿望、态度或推测等。
1.表示能力
(1)表示现在的能力caamn/is/are able to (2)表示将来的能力:will be able to (3)表示过去的能力
Don't worry. Your father may not have been hurt seriously.
别担心,你父亲也.许.伤得不.厉害。 There shouldn't be any difficulty in getting you a visa. 给你弄个签证应.该.不.会.有什么困难。
情态动词讲解精ppt课件
例句
will/would
详细描述:will 表示现在的意愿或 预测,would 表示过去的或虚拟 的意愿或预测。
1. I will help you with your project.(我会帮助你完成你的项 目。)
总结词:表示意愿或预测
例句
2. They would have gone to the party if they had known about it earlier.(如果他们早点 知道,他们就会去参加聚会。)
表示意愿
情态动词+动词原形,如 would like to go,表示 某人想要去。
形式变化
基本形式
情态动词的基本形式包括 现在时、过去时和将来时 。
过去式
情态动词的过去式通常是 在基本形式后面加-d或ed,如could have done 、should have done等。
将来时
情态动词的将来时通常是 在基本形式后面加-will或shall,如will be able to 、shall have to等。
may与might的区别与联系
总结词
may表示现在的许可或可能性;might表示过去的可能性或许可。
详细描述
may用于肯定句中,表示许可或可能性,例如“You may use this room.”(你可以使用这个房间。 )“The book may be in the library.”(这本书可能在图书馆里。)might表示过去的可能性,常 用于过去时态的句子中,例如“He might come tomorrow.”(他明天可能来。)
未必、很难说
She might not agree with us.
表示虚拟语气
will/would
详细描述:will 表示现在的意愿或 预测,would 表示过去的或虚拟 的意愿或预测。
1. I will help you with your project.(我会帮助你完成你的项 目。)
总结词:表示意愿或预测
例句
2. They would have gone to the party if they had known about it earlier.(如果他们早点 知道,他们就会去参加聚会。)
表示意愿
情态动词+动词原形,如 would like to go,表示 某人想要去。
形式变化
基本形式
情态动词的基本形式包括 现在时、过去时和将来时 。
过去式
情态动词的过去式通常是 在基本形式后面加-d或ed,如could have done 、should have done等。
将来时
情态动词的将来时通常是 在基本形式后面加-will或shall,如will be able to 、shall have to等。
may与might的区别与联系
总结词
may表示现在的许可或可能性;might表示过去的可能性或许可。
详细描述
may用于肯定句中,表示许可或可能性,例如“You may use this room.”(你可以使用这个房间。 )“The book may be in the library.”(这本书可能在图书馆里。)might表示过去的可能性,常 用于过去时态的句子中,例如“He might come tomorrow.”(他明天可能来。)
未必、很难说
She might not agree with us.
表示虚拟语气
高中课件 英语 语法和习惯 情态动词
①“must”与“have to” :“必须,不得不”
must: 指说话人认为“主观”上有必要 have to: 指根据约定, 事情的因素有必要
做某事---“客观”
②在疑问句中“must”表示“必须”的回答 形式
肯定 must 否定 needn’t或don’t have to 没必要
E.g: ---Must you go home now? (必须) ---Yes, I must./ No, I needn’t.
e.g: I promise you I will win this competition.
You will regret if you miss the chance to go abroad.
6. 情态动词+have done表示对已经发生事情 推测、责怪、后悔、遗憾等。
must have done 过去一定做过某事 can’t have done 过去不可能做过某事 should ( ought to ) have done 过去本该做某事却没做 shouldn’t ( ought not to ) have done 过去本不该做某事却做了
Unit 2 Sports events
Modal verbs
Modal verbs: general introduction
一.情态动词的语法特征 情态动词表示说话人对某一动作或状态的
态度,可以表示“可能”、“可以”、“需 要”、“必须”或“应当”等之意。
情态动词没有人称和数的变化。 情态动词不能单独作谓语动词用,必须 和不带to的不定式连用构成谓语动词。
1. 情态动词can, could和be able to的用法
①表能力:can 表现在;could表过 去 *我认为没有你的帮助他不能解决这
must: 指说话人认为“主观”上有必要 have to: 指根据约定, 事情的因素有必要
做某事---“客观”
②在疑问句中“must”表示“必须”的回答 形式
肯定 must 否定 needn’t或don’t have to 没必要
E.g: ---Must you go home now? (必须) ---Yes, I must./ No, I needn’t.
e.g: I promise you I will win this competition.
You will regret if you miss the chance to go abroad.
6. 情态动词+have done表示对已经发生事情 推测、责怪、后悔、遗憾等。
must have done 过去一定做过某事 can’t have done 过去不可能做过某事 should ( ought to ) have done 过去本该做某事却没做 shouldn’t ( ought not to ) have done 过去本不该做某事却做了
Unit 2 Sports events
Modal verbs
Modal verbs: general introduction
一.情态动词的语法特征 情态动词表示说话人对某一动作或状态的
态度,可以表示“可能”、“可以”、“需 要”、“必须”或“应当”等之意。
情态动词没有人称和数的变化。 情态动词不能单独作谓语动词用,必须 和不带to的不定式连用构成谓语动词。
1. 情态动词can, could和be able to的用法
①表能力:can 表现在;could表过 去 *我认为没有你的帮助他不能解决这
高中英语情态动词与虚拟语气优秀课件
C Do you suggest who should
D Do you suggest whom should
The commander ordered the soldiers B here for the night.
A stayed
B stay
C would stay
His pale face suggested that he B frightened.
Don’t always make noise. I’d rather you C silent.
A keep
B can keep
C kept
D to keep
It is (high) time that…
“过去式” “should+动词原形” should 不能省
It is high time that they B the war on Iraq.
一坚持〔insist); 二命令〔order, command);三建议 〔suggest, propose, advise) 四要求〔demand, require, request, desire)
A be sent to work there?
A Who do you suggest
B Who do you suggest that should
过去。 9. Need I tell you all the details now? 10. You needn’t go to see him tomorrow.
区别:
You needn’t have worried over such a side-issue yesterday. You didn’t need to worry over such a side-issue today
高中英语情态动词课件精品
couldn’t be a doctor.
B. could可以代替can表示请求、“允许
”。可表示委婉客气的提出问题或陈述
看法
Could you lend me your dictionary? Could I use your bike? Yes, you can. I’m afraid I couldn’t give you an answer today.
意愿“要;愿”
Would 与 Used to do 区别 ——— “过去常常”
Would
------过去习惯的动作(现在有可能还有此习惯)
Used to do
--------过去习惯的动作及状态(现在已经没有此习惯)
e.g. He would get up at 8 a.m. (现在有可能还在坚持此习惯) e.g. He used to get up at 8 a.m. (现在已经不再坚持此习惯)
动作
e.g. There used to be an old building
here when I was young.
状态
shall和should:
1. shall用于构成将来时是助动词。 shall用于征求对方的意见,表示 “决心” 是情态动词。 eg: Perhaps I shall pay a visit to England this winter. 可能今年冬天我会去英国观光。 (构成一般将来时, 助动词)
3)表示请求或允许(和may意思相近)常见于 口语。 Can (May) I come in ? 我能进来吗? Can I smoke here ? 我可以在这里抽烟吗?
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:
B. could可以代替can表示请求、“允许
”。可表示委婉客气的提出问题或陈述
看法
Could you lend me your dictionary? Could I use your bike? Yes, you can. I’m afraid I couldn’t give you an answer today.
意愿“要;愿”
Would 与 Used to do 区别 ——— “过去常常”
Would
------过去习惯的动作(现在有可能还有此习惯)
Used to do
--------过去习惯的动作及状态(现在已经没有此习惯)
e.g. He would get up at 8 a.m. (现在有可能还在坚持此习惯) e.g. He used to get up at 8 a.m. (现在已经不再坚持此习惯)
动作
e.g. There used to be an old building
here when I was young.
状态
shall和should:
1. shall用于构成将来时是助动词。 shall用于征求对方的意见,表示 “决心” 是情态动词。 eg: Perhaps I shall pay a visit to England this winter. 可能今年冬天我会去英国观光。 (构成一般将来时, 助动词)
3)表示请求或允许(和may意思相近)常见于 口语。 Can (May) I come in ? 我能进来吗? Can I smoke here ? 我可以在这里抽烟吗?
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:
情态动词ppt课件市公开课获奖课件省名师示范课获奖课件
I don’t like this TV set. We must buy a new one. There was no more bus. They had to walk home.
• (2) must旳否定形式mustn’t表达禁止, 意思是“不能,不许”。例如:
• (2023上海春)When I was young, I was told that I ______ play with matches
B. it is used to
• C. it was used to
D. it used to be
• 【答案】A D
(三)情态动词+have done
• must表达对某人某事旳猜测;对过去发生旳 事情作肯定判断用must have done
There is nobody here. They must have all gone home.
• can用于肯定句中表达一种理论上旳可能性, 并不牵涉是否真旳会发生;
• The road can be blocked. • could用于肯定句中,语气比can更弱。
• (4)may (not) / might (not)体现一种不太把 握旳推测,意为“或许,可能”;might旳 语气比may较婉转.
• A. might B. should C. could D. would
• 【答案】D
• (2) would表达过去倾向性或习惯性旳动作。 used to 也有这一使用方法,但used to即 可用来体现过去旳习惯性旳动作,也可用 来表达过去旳状态。例如:
• ① (NMET1996上海)When he was there, he ___ go to that coffee shop at the corner after work every day.
• (2) must旳否定形式mustn’t表达禁止, 意思是“不能,不许”。例如:
• (2023上海春)When I was young, I was told that I ______ play with matches
B. it is used to
• C. it was used to
D. it used to be
• 【答案】A D
(三)情态动词+have done
• must表达对某人某事旳猜测;对过去发生旳 事情作肯定判断用must have done
There is nobody here. They must have all gone home.
• can用于肯定句中表达一种理论上旳可能性, 并不牵涉是否真旳会发生;
• The road can be blocked. • could用于肯定句中,语气比can更弱。
• (4)may (not) / might (not)体现一种不太把 握旳推测,意为“或许,可能”;might旳 语气比may较婉转.
• A. might B. should C. could D. would
• 【答案】D
• (2) would表达过去倾向性或习惯性旳动作。 used to 也有这一使用方法,但used to即 可用来体现过去旳习惯性旳动作,也可用 来表达过去旳状态。例如:
• ① (NMET1996上海)When he was there, he ___ go to that coffee shop at the corner after work every day.
情态动词-完整版PPT课件
情态动词 modal verbs
1.情态动词的用法特点
1)情态动词 除 ought 和 have 外,后面只能 接不带to 的不定式。 2)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。 3)情态动词没有非谓语形式,即没有不定式, 分词等形式。
can could may might shall should must will would ought to
have to dare need used to
表示推测
情态动词
不表示推测
2.表示推测——情态动词的重要用法.
情态动词
对将来
对现在
对过去
m肯ust/定sho的uld 推测
+ V. + V. + have done
常见must be + be doi定的推测 can’t, couldn’t
疑问的推测
can, could
+ V.
+ V.
+ have done
+ be doing
可以用not表示“可能不”
+V.
+ V.
+ have done
+ be doing
+ V.
+ V.
+ have done
+ be doing
不同的“肯定”程度可按下列层次排列: He is at home. (事实) He must be at home.(非常肯定的推断) He ought to be at home.(很可能) He could be at home.(很可能) He may be at home.(仅仅可能而已) He might be at home.(或许, 非常不确定) He might not be at home.(也许不在家) He may not be at home. (比might可能) He couldn’t be at home.(很可能不在家) He can’t be at home.(一定不在家)
1.情态动词的用法特点
1)情态动词 除 ought 和 have 外,后面只能 接不带to 的不定式。 2)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。 3)情态动词没有非谓语形式,即没有不定式, 分词等形式。
can could may might shall should must will would ought to
have to dare need used to
表示推测
情态动词
不表示推测
2.表示推测——情态动词的重要用法.
情态动词
对将来
对现在
对过去
m肯ust/定sho的uld 推测
+ V. + V. + have done
常见must be + be doi定的推测 can’t, couldn’t
疑问的推测
can, could
+ V.
+ V.
+ have done
+ be doing
可以用not表示“可能不”
+V.
+ V.
+ have done
+ be doing
+ V.
+ V.
+ have done
+ be doing
不同的“肯定”程度可按下列层次排列: He is at home. (事实) He must be at home.(非常肯定的推断) He ought to be at home.(很可能) He could be at home.(很可能) He may be at home.(仅仅可能而已) He might be at home.(或许, 非常不确定) He might not be at home.(也许不在家) He may not be at home. (比might可能) He couldn’t be at home.(很可能不在家) He can’t be at home.(一定不在家)
情态动词must,have to, have got to 的用法。PPT课件
1. have to 由have + to组成。因此具有have的各种时态。 He is an invalid and has to have a nurse.
She knew what she had to do.
I shall have to reconsider my position. He is always having to exercise judement. 2. 在口语中,have got to 也可以表示义务和需要, 与have to 基本同义。
He has got to go right now.
He hasn’t got to go just yet.
1. 含义不同: must 表示说话人的主观思想,强调个人意志和主观 的决心。 have to侧重于客观上的必要,强调客观条件作用的 结果。 You must do it now.
I have to go now.
1. 你 必须 最好去睡一觉。 You’d better get some sleep. You must get some sleep. 不许 邀请他。 2. 你 最好不 You’d better not invite him. You mustn’t invite him. 应该 照你父母的话办。 3. 你 不得不 You should do what your parents tell you. You have to do what your parents tell you. 不应该 抽这么多的烟。 4. 你 不必要 You oughtn’t to smoke so much. You haven’t got to smoke so much.
1. Don’t be late again. You ____ be here on time. A. may A. can’t B. can B. mustn’t C. must C. needn’t D. needn’t D. have to 2. You ___ do it even if you don’t want to.
英语语法复习:数词情态动词课件 (共15张PPT)
知识讲解
情态动词
情态动词的特点
5. 在以Could引导的表示委婉语气的疑问句,常用来表示请 my party on Saturday afternoon? Yes, I can./Sure./Certainly. Sorry, I am afraid not.
中考英语语法复习
情态动词
学习目标
分类
特点
作用
情态动词
知识讲解
情态动词
I can jump so high. Can you touch the leaves? Yes, I can touch the leaves. 情态动词是一种本身有一定的词义,表示说话人的情绪、态度或语气的动词, 但不能单独作谓语,只能和其他动词原形构成谓语。
知识讲解
情态动词
情态动词的分类
情态动词数量不多,但用途广泛,主要有下面几类: ①只做情态动词:must、can、may……; ②可做情态动词又可做实义动词:need、dare; ③具有情态动词特征:have to、used to、ought to; ④可做情态动词又可作助动词:shall(should)、will(would)。
在协助主动词构成限定动词词组时,具有以下作用词的功能: 3) 构成修辞倒装: Nowhere can he obtain any information about his sister. 4) 代替限定动词词组: —Who can solve this problem? —Tom can.
知识讲解
知识讲解
情态动词
情态动词的特点
1. 具有助动词作用,可以用来构成否定句,疑问句及用于简单回答。 — Can you sing an English song? — Yes, I can. You must go to school at 7:00 in the morning. 2. 后接动词原形,即不带to的不定式。 She may lose her way. You needn’t come so early.
