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河南省新密一高高三英语《语法专题指导-情态动词》课件

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  情态动词的用法 情态动词的基本用法特点 1) 情态动词 除 ought 和 have 外,后面只能接动词

  原型。 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。

  高中阶段都学过哪些情态动词呢 1 can / could / be able to 2 may/might 3 must / have to 4 shall / should 5 will / would 6

  need / dare 7 ought to 1 can / could / be able to 1 Some of us can use computers now, but we

  couldn't last year.(能力) 2 It will be sunny in the day time ,but it can

  rain later on this evening(客观可能性) 3 ---Can I go now ? yes ,you can (请求和允许) 4 Could you wait a few days for the memory? (请求) 5 1 Can this news be true?

  2 It can't be our headmaster.he has gone to

  Beijing.(表推测,主要用于否定和疑问)

  *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. can 与be able to 有何区别? 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 but everyone ______ get out.

  A. had to

  B. would

  C. could

  D. was able to A

  D

  3. They will ______ run this machine on their own in three months. A. can

  B. could

  C. may

  D. be able to D

  2 may / might 1 May I watch Tv after supper?

  Yes you may /No ,you mustn't.(请求许可) 2 It may be true ./ she may come tomorrow / He might have some fever(推测) 3 May you succeed ! May you have many

  more days as happy as this one(祝愿) may/ might as well 还是 -----好 we may as well stay where we are 5. — Could I borrow your dictionary?

  — Yes, of course you _______.

  A. might

  B. will

  C. can

  D. should 6.

  — Might I watch TV after supper?

  — Yes, you ________.

  A. may

  B. must

  C. might

  D. can C

  A

  3 must 语 have to 的 用法 1 You must come to school on time . You mustn't

  waste any more time(必须,禁止) 2

  Must I come back before ten ?

  Yes ,you must.

  No, you needn't./ don't have to 3 It must

  be our headteacher.

  You must be hungry after a long walk.(推测) 4 I really must go now.

  I have to go now,because my mother is in

  hospital.( 不得不) He must be reading, ____ he? You must do it yourself, ____ you? He must have gone over the article,

  ______he? It must have rained last night, _____ it? 3、表推测语气的反意疑问句的构成 isn’t don’t hasn’t didn’t 另外must 还有偏偏一定要的意思 why must you play the piano while others are sleeping. 7. 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 not 8. Johnny, you ______ play with the knife, you

  ______ hurt yourself.

  A. won’t ; can’t

  B. mustn’t ; may

  C. shouldn’t ; must

  D. can’t ; shouldn’t C

  B

  9. --Will you stay for lunch?

  --Sorry, _____. My brother is coming to see me.

  A. I mustn’t

  B. I can’t

  C. I needn’t

  D. I won’t 10. --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 B

  C

  4 shall 与 should 1用于一,三人称疑问句表示征求对方的意见 和 向对方请示

  Shall the driver wait ?What shall we do next ? 2 用于 二 三人称陈述句表示命令警告,允诺, 威胁以及法律条文规定 You shall go with me / He shall be punished

  You shall have the book when I finish it All the children shall go to school at the age

  of seven. 3表示劝告和建议 You should study hard. 4 表推测 They should have arrived by two o'clock 5用于if 条件句表示万一 Ask Tom to ring me up if you should see him. Shoud I be free tomorrow ,I will come. 6 表竟然 I don't know why you should be so rude to

  your mother

  Tom’s father promised, “You ___have a new computer if you pass the coming examination,”

  A.can

  B.should

  C.shall

  D.may

  C

  ------When can I come for the photos ? I need them tomorrow afternoon. -----They _____be ready by 12 : 00 .

  (

  A. can

  B. should C. might

  D. need

  B

  You ought to have helped him with his English, ____you ?

  A. won’t you

  B. ought not you C. shouldn’t you D. wouldn’t you

  C 5 will 与 would 的用法 1 表示意志和意愿 I will never do it again. They said that they would help us. 2 表请求,建议 Will you please take a message for me? Would you please pass him the book? 3 表功能 This machine won't work. 4 表示习惯性动作与used to有何区别 Fish will die without water. Every evening ,he would sit by the window. 6 need 语 dare的用法 既可做实意动词又可做情态动词。做情态动词用于 否定和疑问句而做实意动词可用于肯定,否定疑问 How dare you say such a thing?

  How dare you to say such a thing? He daren’t to speak English before such a

  crowd, did he?

  He daren’t speak English before such a

  crowd, dare he? She _____out alone at night.

  (

  )

  A.dare not to go

  B. dares not go

  C. doesn’t dare to go

  D. doesn’t dares go C 7 ought to 的 用法 1 表应该与 should 的 区别 You ought to take care of him. You are his father .You ought to get him

  to receive good education

  2 表推测 He ought to be home by now. He must be home by now. 一 情态动词+ 完成时表对过去的推测 1 must have done(仅用于肯定句) 2 can't /couldn't have done(用于否定疑问句) 3 may have done (肯定,否定均可) 4 might have done(肯定,否定均可)

  二 表虚拟 1 should / could /would /might have done 三

  needn't have done

  would rather have done

  had better have done

  Jenny ____with him at that time, for I was having dinner with her in my home. (

  )

  A.can’t have been

  B. mustn’t have been

  C. must be

  D. may be

  A

  They are disappointed at the English party. They say that it ___better organized. (

  ) A.had been

  B. had to be C. must have been

  D. could have been

  D ---- Did you walked home by yourself last night ? ---- Yes, I did. But I think I _____.

  (

  ) A.

  needn’t

  B. shouldn’t C. may not have

  D. needn’t have D 8. We______last night, but we went to the concert instead. A. must have studied

  B. might study C. should have studied

  D. would study 9. There was plenty of time. She_____. A. mustn’t have hurried

  B. couldn’t have hurried C. mustn’t hurry

  D. needn’t have hurried 10. Yesterday, Jane walked away from the discussion. Otherwise. She____something she would regret later. A. had said

  B. said C. might say

  D. might have said.

  C D D 11. ----Did you scold him for his mistake? ----Yes, but______it. A. I’d rather not do B. I’d better not do C. I’d better not have done D. I’d rather have not done D

  情态动词的用法 情态动词的基本用法特点 1) 情态动词 除 ought 和 have 外,后面只能接动词

  原型。 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。

  高中阶段都学过哪些情态动词呢 1 can / could / be able to 2 may/might 3 must / have to 4 shall / should 5 will / would 6

  need / dare 7 ought to 1 can / could / be able to 1 Some of us can use computers now, but we

  couldn't last year.(能力) 2 It will be sunny in the day time ,but it can

  rain later on this evening(客观可能性) 3 ---Can I go now ? yes ,you can (请求和允许) 4 Could you wait a few days for the memory? (请求) 5 1 Can this news be true?

  2 It can't be our headmaster.he has gone to

  Beijing.(表推测,主要用于否定和疑问)

  *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. can 与be able to 有何区别? 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 but everyone ______ get out.

  A. had to

  B. would

  C. could

  D. was able to A

  D

  3. They will ______ run this machine on their own in three months. A. can

  B. could

  C. may

  D. be able to D

  2 may / might 1 May I watch Tv after supper?

  Yes you may /No ,you mustn't.(请求许可) 2 It may be true ./ she may come tomorrow / He might have some fever(推测) 3 May you succeed ! May you have many

  more days as happy as this one(祝愿) may/ might as well 还是 -----好 we may as well stay where we are 5. — Could I borrow your dictionary?

  — Yes, of course you _______.

  A. might

  B. will

  C. can

  D. should 6.

  — Might I watch TV after supper?

  — Yes, you ________.

  A. may

  B. must

  C. might

  D. can C

  A

  3 must 语 have to 的 用法 1 You must come to school on time . You mustn't

  waste any more time(必须,禁止) 2

  Must I come back before ten ?

  Yes ,you must.

  No, you needn't./ don't have to 3 It must

  be our headteacher.

  You must be hungry after a long walk.(推测) 4 I really must go now.

  I have to go now,because my mother is in

  hospital.( 不得不) He must be reading, ____ he? You must do it yourself, ____ you? He must have gone over the article,

  ______he? It must have rained last night, _____ it? 3、表推测语气的反意疑问句的构成 isn’t don’t hasn’t didn’t 另外must 还有偏偏一定要的意思 why must you play the piano while others are sleeping. 7. 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 not 8. Johnny, you ______ play with the knife, you

  ______ hurt yourself.

  A. won’t ; can’t

  B. mustn’t ; may

  C. shouldn’t ; must

  D. can’t ; shouldn’t C

  B

  9. --Will you stay for lunch?

  --Sorry, _____. My brother is coming to see me.

  A. I mustn’t

  B. I can’t

  C. I needn’t

  D. I won’t 10. --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 B

  C

  4 shall 与 should 1用于一,三人称疑问句表示征求对方的意见 和 向对方请示

  Shall the driver wait ?What shall we do next ? 2 用于 二 三人称陈述句表示命令警告,允诺, 威胁以及法律条文规定 You shall go with me / He shall be punished

  You shall have the book when I finish it All the children shall go to school at the age

  of seven. 3表示劝告和建议 You should study hard. 4 表推测 They should have arrived by two o'clock 5用于if 条件句表示万一 Ask Tom to ring me up if you should see him. Shoud I be free tomorrow ,I will come. 6 表竟然 I don't know why you should be so rude to

  your mother

  Tom’s father promised, “You ___have a new computer if you pass the coming examination,”

  A.can

  B.should

  C.shall

  D.may

  C

  ------When can I come for the photos ? I need them tomorrow afternoon. -----They _____be ready by 12 : 00 .

  (

  A. can

  B. should C. might

  D. need

  B

  You ought to have helped him with his English, ____you ?

  A. won’t you

  B. ought not you C. shouldn’t you D. wouldn’t you

  C 5 will 与 would 的用法 1 表示意志和意愿 I will never do it again. They said that they would help us. 2 表请求,建议 Will you please take a message for me? Would you please pass him the book? 3 表功能 This machine won't work. 4 表示习惯性动作与used to有何区别 Fish will die without water. Every evening ,he would sit by the window. 6 need 语 dare的用法 既可做实意动词又可做情态动词。做情态动词用于 否定和疑问句而做实意动词可用于肯定,否定疑问 How dare you say such a thing?

  How dare you to say such a thing? He daren’t to speak English before such a

  crowd, did he?

  He daren’t speak English before such a

  crowd, dare he? She _____out alone at night.

  (

  )

  A.dare not to go

  B. dares not go

  C. doesn’t dare to go

  D. doesn’t dares go C 7 ought to 的 用法 1 表应该与 should 的 区别 You ought to take care of him. You are his father .You ought to get him

  to receive good education

  2 表推测 He ought to be home by now. He must be home by now. 一 情态动词+ 完成时表对过去的推测 1 must have done(仅用于肯定句) 2 can't /couldn't have done(用于否定疑问句) 3 may have done (肯定,否定均可) 4 might have done(肯定,否定均可)

  二 表虚拟 1 should / could /would /might have done 三

  needn't have done

  would rather have done

  had better have done

  Jenny ____with him at that time, for I was having dinner with her in my home. (

  )

  A.can’t have been

  B. mustn’t have been

  C. must be

  D. may be

  A

  They are disappointed at the English party. They say that it ___better organized. (

  ) A.had been

  B. had to be C. must have been

  D. could have been

  D ---- Did you walked home by yourself last night ? ---- Yes, I did. But I think I _____.

  (

  ) A.

  needn’t

  B. shouldn’t C. may not have

  D. needn’t have D 8. We______last night, but we went to the concert instead. A. must have studied

  B. might study C. should have studied

  D. would study 9. There was plenty of time. She_____. A. mustn’t have hurried

  B. couldn’t have hurried C. mustn’t hurry

  D. needn’t have hurried 10. Yesterday, Jane walked away from the discussion. Otherwise. She____something she would regret later. A. had said

  B. said C. might say

  D. might have said.

  C D D 11. ----Did you scold him for his mistake? ----Yes, but______it. A. I’d rather not do B. I’d better not do C. I’d better not have done D. I’d rather have not done D

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