情态动词解析
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课件13张PPT。The modal verbscan // could:1. Man can not live without air.
2. Can I go now?能力
请求3. Could I come to see you tomorrow ?
Yes, you _____ . ( No, I’m afraid not.)can4. Can this be true?
5. How can you be so rude!在否定、疑问、或者惊叹句中表示惊异、怀疑、不相信。may // might: 可能，或许1. You may drive my car.许可2. May you succeed ! 祈使句中表示祝愿must // have toMust I clean all the room ? 询问对方的意见Yes , you must.
No you needn’t. ( don’t have to)1. Isn’t that Ann’s husband over there?
No , it ____ be him--- I’m sure he doesn’t wear glasses.
A can’t B must not C won’t D may not2. You ____ be tired--- you’ve only been working for an hour.有根据的肯定推测，在肯定句中用must, 否定句中用can’tshall // should // ought toshall 用于第一和第三人称的疑问句中表示征求对方的意见或请求。Shall we go now ?1. Excuse me , but I want to use your computer to type a report.
----You ____ have my computer if you don’t take care of it.
A shall not B might not
C needn’t D shouldn’t2. “ The interest ____ be divided into five parts,according to the agreement made by both sides,” declared the judge.A may B should C must D shallshall 用于第二 和第三人称陈述句中，表示说话人给对方的警告、命令、义务、许诺或者威胁。should // ought to 表示建议、劝告。 ought to 语气重，有“按道理应该” 之意。并且在反映客观情况或者涉及法律、义务和规定时一般用ought to.will // would:表意愿用于第一人称Will // would you pass me the book ?
I will never do that again.
This will be the book you want.During the vacation he would visit me every week.
It would be about ten when he left home.Have a try:Who is the girl standing over there ?
--- Well , if you ____ know , her name is Mabel.
A may B can C must D shall
2. Listen to the laughter; the girls ___ themselves.
A may enjoy B can be enjoying
C must have enjoyed D must be enjoying3. His leg was broken , but he ____ swim to the bank.
A could B was able to
C can D would
4. After the fire , people ____ rush out of the hotel.
A could B was able to
C can D would
6. You mustn’t park you car here , ______ you ?
7. He must be from the north , ____ he ?
A mustn’t B isn’t C needn’t D may not
8. It must have rained last night , _______?
A mustn’t it B can’t it C hasn’t it D didn’t it
9. You must have read the book before , _______ you ?
Dmusthaven’t(1)He must be a lawyer , isn’t he?
因为本句的must be是表对现在情况的推测，作“想必”解，故反意疑问部分用“isn’t + 主语”构成。
( 2 ) You mustn’t park you car here , must you ?
因为本句的mustn’t表“禁止”，故反意疑问部分一般兴用must.
( 3 ) You must have read the book before , haven’t you ?
( 4 ) She must have come here yesterday, didn’t she ?
当陈述句的谓语是“must + have + done”时，表对过去情况的推测，若强调动作的完成效果，反意疑问部分用“haven’t（hasn’t）+ 主语”构成；但若只强调对过去情况的推测（常带有表具体时间的状语），反意疑问部分则用“didn’t / wasn’t + 主语”构成。1. 陈述部分如出现must, 反意疑问部分要视句子具体意思而定。
eg (1)He must be a lawyer , isn’t he?
因为本句的must be是表对现在情况的推测，作“想必”解，故反意疑问部分用“isn’t + 主语”构成。 （2）I must do my homework right now , needn’t I ?
因为本句的must表必须，故反意疑问部分用needn’t. （3）You mustn’t park you car here , must you ?
因为本句的mustn’t表“禁止”，故反意疑问部分一般兴用must.
2. Can I go now?能力
请求3. Could I come to see you tomorrow ?
Yes, you _____ . ( No, I’m afraid not.)can4. Can this be true?
5. How can you be so rude!在否定、疑问、或者惊叹句中表示惊异、怀疑、不相信。may // might: 可能，或许1. You may drive my car.许可2. May you succeed ! 祈使句中表示祝愿must // have toMust I clean all the room ? 询问对方的意见Yes , you must.
No you needn’t. ( don’t have to)1. Isn’t that Ann’s husband over there?
No , it ____ be him--- I’m sure he doesn’t wear glasses.
A can’t B must not C won’t D may not2. You ____ be tired--- you’ve only been working for an hour.有根据的肯定推测，在肯定句中用must, 否定句中用can’tshall // should // ought toshall 用于第一和第三人称的疑问句中表示征求对方的意见或请求。Shall we go now ?1. Excuse me , but I want to use your computer to type a report.
----You ____ have my computer if you don’t take care of it.
A shall not B might not
C needn’t D shouldn’t2. “ The interest ____ be divided into five parts,according to the agreement made by both sides,” declared the judge.A may B should C must D shallshall 用于第二 和第三人称陈述句中，表示说话人给对方的警告、命令、义务、许诺或者威胁。should // ought to 表示建议、劝告。 ought to 语气重，有“按道理应该” 之意。并且在反映客观情况或者涉及法律、义务和规定时一般用ought to.will // would:表意愿用于第一人称Will // would you pass me the book ?
I will never do that again.
This will be the book you want.During the vacation he would visit me every week.
It would be about ten when he left home.Have a try:Who is the girl standing over there ?
--- Well , if you ____ know , her name is Mabel.
A may B can C must D shall
2. Listen to the laughter; the girls ___ themselves.
A may enjoy B can be enjoying
C must have enjoyed D must be enjoying3. His leg was broken , but he ____ swim to the bank.
A could B was able to
C can D would
4. After the fire , people ____ rush out of the hotel.
A could B was able to
C can D would
6. You mustn’t park you car here , ______ you ?
7. He must be from the north , ____ he ?
A mustn’t B isn’t C needn’t D may not
8. It must have rained last night , _______?
A mustn’t it B can’t it C hasn’t it D didn’t it
9. You must have read the book before , _______ you ?
Dmusthaven’t(1)He must be a lawyer , isn’t he?
因为本句的must be是表对现在情况的推测，作“想必”解，故反意疑问部分用“isn’t + 主语”构成。
( 2 ) You mustn’t park you car here , must you ?
因为本句的mustn’t表“禁止”，故反意疑问部分一般兴用must.
( 3 ) You must have read the book before , haven’t you ?
( 4 ) She must have come here yesterday, didn’t she ?
当陈述句的谓语是“must + have + done”时，表对过去情况的推测，若强调动作的完成效果，反意疑问部分用“haven’t（hasn’t）+ 主语”构成；但若只强调对过去情况的推测（常带有表具体时间的状语），反意疑问部分则用“didn’t / wasn’t + 主语”构成。1. 陈述部分如出现must, 反意疑问部分要视句子具体意思而定。
eg (1)He must be a lawyer , isn’t he?
因为本句的must be是表对现在情况的推测，作“想必”解，故反意疑问部分用“isn’t + 主语”构成。 （2）I must do my homework right now , needn’t I ?
因为本句的must表必须，故反意疑问部分用needn’t. （3）You mustn’t park you car here , must you ?
因为本句的mustn’t表“禁止”，故反意疑问部分一般兴用must.