外研版（2019）必修第二册Unit 1 Food for thought Using language 情态动词课件（27张PPT）
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| 名称 | 外研版（2019）必修第二册Unit 1 Food for thought Using language 情态动词课件（27张PPT） |  | |
| 格式 | pptx | ||
| 文件大小 | 261.6KB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2022-12-06 17:17:01 | ||
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文档简介
(共27张PPT)
情态动词
modal
概述
情态=情感+态度 表需要、可能、意愿、怀疑等
形式：没有人称和数的变化;
后加动词原型
加be doing表示动作正在进行，
加have done表示动作已经完成。
否定其后加not构成
一般疑问句通常将情态动词提到句首
review
1. can & could
① 表示能力 “能，会”
You can pass the English exam.
I can speak fluent English now , but I couldn’t last year. ② 表示请求或许可 “可以”
Can I borrow your bike for today
Could we turn the air conditioner on ③ 表示猜测“可能”
As a human being, anyone can make a mistake.
You couldn't have seen me there.
3. will & would
① 表意愿,决心等
I won’t do anything against her.
He would finish the task the boss ordered him to do.
② 表经常性，习惯性，倾向性，
I will finish my work at the first ime.
He would have coffee with his college before he retired. ③ 表功能，性质
The tree will live without water for 3 months.
3. will & would
④表估计:"想必，大概"(只时态区别)
That will be the messenger ringing.
The person you mentioned would be her father
⑤表"请求/要求"
Will you please take a message for him
Would you please tell me your telephone number
4. shall & should
shall
①表征求意见("好不好")
Shall we go camping this weekend.
② 表允诺、威胁、警告、命令
Don’t worry, you shall get the answer this afternoon. ③ 表规章、法令、预言:"必须"
Passengers shall not talk with the driver while the bus is moving.
4. shall & should
Should
① 责任，义务或要求
You should pay more attention to what your teacher says.
② 推测和可能性，是" (按理说)应该”
He should be around sixty years old.
If things should change suddenly, please let me know. ③ 用于疑问句或感叹句中，表示意外、惊异，意为“竟会”
Don’t ask me. How should I know
5. must
① 表示必须、必要 （needn’t）
You must go back home with him early this evening.
② 表示推测，意为“准是”“一定是”
They must have finished their meal.The mother is washing dishes. ③ 表示"非要，偏要"
Must you open the window It's so cold outside.
④mustn't意思为"不许、不准"，表示禁止。
You mustn't play football in the street.
6. need 需要、必须
There is nothing I need fear.
He doesn’t need to wear glasses all the time.
Does anybody need to see the doctor
You needn’t have come last night.
7. ought to
① 应该表义务、责任或劝告
Such things ought not to be permitted.
We oughtn’t to take risk.
I don’t think you ought to have done that.
② 推断，意思为“应该”、”可能“
I ought to go abroad for further study next month.
You oughtn’t to be talking so much under this situation.
You ought to be hearing from me soon.
8. would rather 宁可，宁愿
He would rather get advice from his parents.
I’d would rather play volleyball than do kungfu.
I'd rather you didn't talk about this to anyone.
Our parents would never do anything to hurt us.
Would you rather choose the old one
study
1. dare
① Dare作情态动词时，敢于, 主要用于疑问句、否定句和条件从句中，一般不用在肯定句中。
—Dare you tell her the truth
—Yes, I dare. /No, I daren’t.
How dare you accuse me of lying!
He daren’t admit this.
② Dare作实义动词时，在肯定句中，dare后接带to的不定式
Only a few journalists dared to cover the story.
He doesn’t dare (to) go there alone.
Don’t you dare (to) touch it
practice
How_______ you accuse me of cheating in the exam!
He_______ admit that he spending all his money in gambling.
If you _______ do such a thing, you are sure to be punished.
If he_______ say such a thing again, I shall knock him down.
dare
daren’t
dare
dare
2. need
① 作情态动词时，需要、必须, 主要用于疑问句、否定句
You need not admit the entire truth.
Need I do my homework now
-Yes, you must.
-No, you needn’t/don’t have to.
②作实义动词时，后接带to的不定式
I need to know the truth.
He needs to practice more.
Your car needs washing
= Your car needs to be washed.
You needn’t have told him this news. He knew it already.
归纳拓展：
sb needs sth表示”某人需要某物”
sb needs to do sth，表示”某人需要去做某事”
sth need doing. 某事需要被做
= need to be done
need/needn’t+动词完成式，表示过去”需要但实际未做“或”过去不需要，但却做了
practice
I didn’t _______ to buy the dictionary. I had a copy at home.
The team _______ to finish their project before this year.
You needn't ___________ (take)it seriously yesterday.
They needed _______(help) others with the difficulty.
need
needs
have taken
to help
3. be able to 能够
You don't have to tell him about the sad news.
He was able to flee Europe before the war broke out.
They will be able to tell you the news soon.
Are you able to finish the task this morning
Lingling has been able to play the piano for over 2 years.
The fire was very big, but most people were able to escape from the building.
4. have to 不得不
The young man has to work for 16 hours a day to earn enough money.
He doesn't have to do the homework now.
He had to look after his sister last week.
We didn't have to answer the question yesterday.
Do I have to go there now
—Yes, you do.
—No, you don't have to.
4. have to VS must
① have to则往往强调客观需要, 而must表示的是说话人的主观看法。
I had to work when I was your age.
The play is not interesting. I really must go now.
② have有更多的时态形式, must一般只表现在一般现在时。
③ 二者的否定意义不大相同。
You don't have to go. 你不必去。
You mustn't go. 你可不要去。
5. had better 最好
① had better 只有一种形式，它后面要跟动词原形。
had better do sth had better not do sth
It is pretty cold outside. You'd better put on your coat.
He just left, you had better have come earlier.
You had better not smoke for there are some babies.
Hadn't we better stop now
have a test
1. Nothing is hard in the world, if you _______scale the heights.
2. You_______ have watered the plants, for it is going to rain.
3. He _______ speak English before such a crowd, dare he
4. Do they _______ pay their bill before the end of the month
5. I’ve always wanted to _______speak fluent English.
dare
needn’t
daren’t
have to
be able to
have a test
6. He _______ go because of somebody's calling him that day.
7. In order to take the exam, we_______ finish the whole book by the end of this month .
8. It's dark already, we _______ go back homework.
9. My brother was very ill, so I _______ call the doctor in the middle of the night.
10. Those bags look really heavy, are you sure you_______ to carry them on your own
had to
will have to
had better
had to
will be able
have a test
11. You _______ sit here and have a rest before having next try.
12. I _______ leave school because my family is poor now.
13. I wonder if we ___________ take sleeping bag.
14. If he _______ say such a thing again, I shall knock him down.
15. After the accident it was a long time before she _______ walk again.
had better
have to
need
dare
was able to
口诀:
情态动词两特点
动词原形接后面，说话语气较委婉。
can "能力"may"许可"，must"责任"或"义务"。
否定回答needn't换，"需要"need, dare"敢"。
should"应该"，would"愿"，have to"被迫"表客观。
thank you
情态动词
modal
概述
情态=情感+态度 表需要、可能、意愿、怀疑等
形式：没有人称和数的变化;
后加动词原型
加be doing表示动作正在进行，
加have done表示动作已经完成。
否定其后加not构成
一般疑问句通常将情态动词提到句首
review
1. can & could
① 表示能力 “能，会”
You can pass the English exam.
I can speak fluent English now , but I couldn’t last year. ② 表示请求或许可 “可以”
Can I borrow your bike for today
Could we turn the air conditioner on ③ 表示猜测“可能”
As a human being, anyone can make a mistake.
You couldn't have seen me there.
3. will & would
① 表意愿,决心等
I won’t do anything against her.
He would finish the task the boss ordered him to do.
② 表经常性，习惯性，倾向性，
I will finish my work at the first ime.
He would have coffee with his college before he retired. ③ 表功能，性质
The tree will live without water for 3 months.
3. will & would
④表估计:"想必，大概"(只时态区别)
That will be the messenger ringing.
The person you mentioned would be her father
⑤表"请求/要求"
Will you please take a message for him
Would you please tell me your telephone number
4. shall & should
shall
①表征求意见("好不好")
Shall we go camping this weekend.
② 表允诺、威胁、警告、命令
Don’t worry, you shall get the answer this afternoon. ③ 表规章、法令、预言:"必须"
Passengers shall not talk with the driver while the bus is moving.
4. shall & should
Should
① 责任，义务或要求
You should pay more attention to what your teacher says.
② 推测和可能性，是" (按理说)应该”
He should be around sixty years old.
If things should change suddenly, please let me know. ③ 用于疑问句或感叹句中，表示意外、惊异，意为“竟会”
Don’t ask me. How should I know
5. must
① 表示必须、必要 （needn’t）
You must go back home with him early this evening.
② 表示推测，意为“准是”“一定是”
They must have finished their meal.The mother is washing dishes. ③ 表示"非要，偏要"
Must you open the window It's so cold outside.
④mustn't意思为"不许、不准"，表示禁止。
You mustn't play football in the street.
6. need 需要、必须
There is nothing I need fear.
He doesn’t need to wear glasses all the time.
Does anybody need to see the doctor
You needn’t have come last night.
7. ought to
① 应该表义务、责任或劝告
Such things ought not to be permitted.
We oughtn’t to take risk.
I don’t think you ought to have done that.
② 推断，意思为“应该”、”可能“
I ought to go abroad for further study next month.
You oughtn’t to be talking so much under this situation.
You ought to be hearing from me soon.
8. would rather 宁可，宁愿
He would rather get advice from his parents.
I’d would rather play volleyball than do kungfu.
I'd rather you didn't talk about this to anyone.
Our parents would never do anything to hurt us.
Would you rather choose the old one
study
1. dare
① Dare作情态动词时，敢于, 主要用于疑问句、否定句和条件从句中，一般不用在肯定句中。
—Dare you tell her the truth
—Yes, I dare. /No, I daren’t.
How dare you accuse me of lying!
He daren’t admit this.
② Dare作实义动词时，在肯定句中，dare后接带to的不定式
Only a few journalists dared to cover the story.
He doesn’t dare (to) go there alone.
Don’t you dare (to) touch it
practice
How_______ you accuse me of cheating in the exam!
He_______ admit that he spending all his money in gambling.
If you _______ do such a thing, you are sure to be punished.
If he_______ say such a thing again, I shall knock him down.
dare
daren’t
dare
dare
2. need
① 作情态动词时，需要、必须, 主要用于疑问句、否定句
You need not admit the entire truth.
Need I do my homework now
-Yes, you must.
-No, you needn’t/don’t have to.
②作实义动词时，后接带to的不定式
I need to know the truth.
He needs to practice more.
Your car needs washing
= Your car needs to be washed.
You needn’t have told him this news. He knew it already.
归纳拓展：
sb needs sth表示”某人需要某物”
sb needs to do sth，表示”某人需要去做某事”
sth need doing. 某事需要被做
= need to be done
need/needn’t+动词完成式，表示过去”需要但实际未做“或”过去不需要，但却做了
practice
I didn’t _______ to buy the dictionary. I had a copy at home.
The team _______ to finish their project before this year.
You needn't ___________ (take)it seriously yesterday.
They needed _______(help) others with the difficulty.
need
needs
have taken
to help
3. be able to 能够
You don't have to tell him about the sad news.
He was able to flee Europe before the war broke out.
They will be able to tell you the news soon.
Are you able to finish the task this morning
Lingling has been able to play the piano for over 2 years.
The fire was very big, but most people were able to escape from the building.
4. have to 不得不
The young man has to work for 16 hours a day to earn enough money.
He doesn't have to do the homework now.
He had to look after his sister last week.
We didn't have to answer the question yesterday.
Do I have to go there now
—Yes, you do.
—No, you don't have to.
4. have to VS must
① have to则往往强调客观需要, 而must表示的是说话人的主观看法。
I had to work when I was your age.
The play is not interesting. I really must go now.
② have有更多的时态形式, must一般只表现在一般现在时。
③ 二者的否定意义不大相同。
You don't have to go. 你不必去。
You mustn't go. 你可不要去。
5. had better 最好
① had better 只有一种形式，它后面要跟动词原形。
had better do sth had better not do sth
It is pretty cold outside. You'd better put on your coat.
He just left, you had better have come earlier.
You had better not smoke for there are some babies.
Hadn't we better stop now
have a test
1. Nothing is hard in the world, if you _______scale the heights.
2. You_______ have watered the plants, for it is going to rain.
3. He _______ speak English before such a crowd, dare he
4. Do they _______ pay their bill before the end of the month
5. I’ve always wanted to _______speak fluent English.
dare
needn’t
daren’t
have to
be able to
have a test
6. He _______ go because of somebody's calling him that day.
7. In order to take the exam, we_______ finish the whole book by the end of this month .
8. It's dark already, we _______ go back homework.
9. My brother was very ill, so I _______ call the doctor in the middle of the night.
10. Those bags look really heavy, are you sure you_______ to carry them on your own
had to
will have to
had better
had to
will be able
have a test
11. You _______ sit here and have a rest before having next try.
12. I _______ leave school because my family is poor now.
13. I wonder if we ___________ take sleeping bag.
14. If he _______ say such a thing again, I shall knock him down.
15. After the accident it was a long time before she _______ walk again.
had better
have to
need
dare
was able to
口诀:
情态动词两特点
动词原形接后面，说话语气较委婉。
can "能力"may"许可"，must"责任"或"义务"。
否定回答needn't换，"需要"need, dare"敢"。
should"应该"，would"愿"，have to"被迫"表客观。
thank you