外研版（2019） 必修第二册 Unit 1 Food for Thought Understanding ideas Grammar 课件-（25张PPT）
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| 名称 | 外研版（2019） 必修第二册 Unit 1 Food for Thought Understanding ideas Grammar 课件-（25张PPT） |  | |
| 格式 | pptx | ||
| 文件大小 | 5.0MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2022-10-20 19:41:35 | ||
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文档简介
(共25张PPT)
Unit 1
Food for thought
Period 2 Grammar: modals
a ... I was able to hold a knife and fork - and chopsticks!
b But there are still some dishes that Dad dare not try even after many years of marriage to my mother.
c ...Mum and I just have to find a way to get him into the kitchen!
d ... we'd better not eat too much roast food as it may make us suffer from heat inside our bodies, ...
e “You needn't try it if you don't want to," Mum said,...
Step 1 Lead in
Read the sentences and pay attention to the words in bold.
Activity 1 Match the words in bold with the meanings.
2
4
3
5
1
情态动词表示说话人的语气和情态，如需要，可能，愿意和怀疑等，有一定的意义，但不完整，必须和动词原形一起构成谓语，常见的情态动词有：can, could, may, might, must, ought to, shall, will, should, would，had better及半情态动词need, dare, be to do, have to , be able to 。
情态动词的主要特征：
1. 有一定的词义，但不能单独作谓语。它们要和行为动词或连系动词连用构成谓语。如： He may come tomorrow.
2. 没有人称与数的变化（have to/need除外）。
3. 后面接动词原形，即不带to的不定式（ought to, have to, used to本身带to）。
4. 具有助动词的作用，即可构成否定句、疑问句及用于简明答语。
Activity 2 Underline the modals and talk about their meanings.
dare not – be afraid to do something
needn’t – not be necessary to do something
have to – be necessary to do something
be able to – have the ability to do something
aren’t able to – don’t have the ability to do something
had better – give advice to do something
Step 3 Practice
have to
dare not
had better
needn’t / don’t have to
be able to
Step 2 Presentation
情态动词（Modal Verbs)
can / could / be able to
may / might
will / would
shall / should /ought to
must / have to
need/dare
had better
Function of models
ability 能力
possibility 可能性
advice 建议
agreement 赞同
guessing 猜测
necessity 必要性
permission 许可
prediction 预测
promise 许诺
request 请求
past habit 过去习惯
can/could
Jim isn't very good at maths or science, but he can speak English very well.
Our history test was so long last week that no one could finish it.
It was the last day of school, but the teacher said that we could not leave early.
The hunters have been lost for days. They could starve.
Could you please show me the way to Beihai Park
可能性
能力
请求
可能性
能力
may/might
What award did you get for the sports competition May I have a look
Our football team didn't play very well today, but we might do better tomorrow.
请求
许可
可能性
During the Spring Festival time the whole family will come for dinner.
My uncle was poor but liked fashion, so he would often dress up as a rich man.
Are you free this Saturday Would you like to join my family for dinner
will/would
许诺
请求
过去习惯
预测
The harvest festival begins on Saturday. We shall be there with our friends.
When going by plane, you should arrive at the airport at least one hour early.
It's nearly time for class to start. The teacher should be here soon.
shall/should
许诺
建议
预测
When you eat fish you must be careful with the bones.
Wang Feng has won the English competition three times. He must be very smart.
A man landed on Mars You must be joking. That can't be true.
must /can't
建议
必要性
猜测
猜测
may / might
1)表示许可(疑问句)。
表示请求，允许时， might 比may 的语气委婉。否定回答时，可用can 或 mustn’t, 表示“不可以，禁止，阻止”之意。
--- May I take this book out
--- Yes, you can. / No, you can’t (mustn’t).
2) 用于祈使句，表示祝愿
May you succeed!
3) 表示推测，可能（不用于疑问句）
The bottle looks blue. There may / might be some ink in it.
can / could
1) 表示能力或客观可能性
I can draw a horse in five minutes.
Man cannot live without air.
2) 表示请求或允许。could 表示请求时语气较委婉，主要用于疑问句，但回答时应用can
--- Could I call you by your first name
--- Yes, you can.
3) 用于否定句和疑问句，表示推测。
The young girl can’t / couldn’t be our new chairman.
Can the news be true
3. will / would
1) 表示请求，建议等， would 比will 委婉客气
Would you pass me the book
2) 表示意志，愿望和决心
I will never do that again.
3) would 可以表示过去反复发生的动作或某种倾向。
During the vacation he would visit me every week.
4) 表示估计或猜想
I thought he would have told you all about it.
4. shall / should
1) shall 用于第一、第三人称时，表示征求对方的意愿或向对方请求。
Shall we go for a picnic this weekend
2) shall 用于第二、第三人称时，表示说话人给对方的命令、警告、 允诺或威胁
You shall fail if you don’t work harder.
3) should 表示劝告、建议或命令
You should obey the rule in any case.
4) should表示推测
He should be at the reading room now.
5. must 和 can 的用法
1) must表示必须、必要或用以征求对方意见。回答must 引导的问句时，其否定回答要用needn’t 或don’t have to.
--Must we hand in our exercise books today
--Yes, you must. / No, you don’t have to (you needn’t).
2) must 表示推测，用于肯定句中。
This must be your pen.
Look! There’s a light on Dr. Baker’s office. He ______ be working in his office.
It _______sound strange, but it is true.
When I was young, I _______ sing for hours.
--When can I come for the photos I need them tomorrow afternoon.
--They ________ be ready by 12:00.
(5) Mr. Bush is on time for everything. How _____ it be that he was late for the opening ceremony
must
may
would
should
can
(6) A bear ______ not touch a dead body.
(7) --There were already five people in the car but they managed to take me as well.
--It ______ not have been a comfortable journey.
(8) Johnny, you ________play with the knife, or you may hurt yourself.
(9) Professor Wang, many students want to see you. _______ they sit here or outside
(10) --Are you coming to Jeff’s party
--I’m not sure. I ____________ go to the concert instead.
will
could
mustn’t
Shall
may / might
must have done 表示对已经发生事情的肯定猜测。“必定已经”
should / ought to have done 表示”本来应该做到,但实际未做到”，常含有责备口气。（否定形式表示”本不该做而做了”）
may / might have done, 本可以做而没做，突出可能性。
can/could have done 表示有能力或有可能做而实际没有做。
can’t / couldn’t have done, 表示对已经发生事情的否定猜测。
needn’t have done 本不必做的事却做了。
难点对比
1.I didn’t see her in the meeting room this morning,
She couldn’t have spoken at the meeting.
2. I didn’t hear the phone. I must have been asleep.
3. You should have told me about it earlier.
4. I could have helped you if you had asked me.
Step 3 Practice
have to
dare not
had better
needn’t / don’t have to
be able to
Thank You
Unit 1
Food for thought
Period 2 Grammar: modals
a ... I was able to hold a knife and fork - and chopsticks!
b But there are still some dishes that Dad dare not try even after many years of marriage to my mother.
c ...Mum and I just have to find a way to get him into the kitchen!
d ... we'd better not eat too much roast food as it may make us suffer from heat inside our bodies, ...
e “You needn't try it if you don't want to," Mum said,...
Step 1 Lead in
Read the sentences and pay attention to the words in bold.
Activity 1 Match the words in bold with the meanings.
2
4
3
5
1
情态动词表示说话人的语气和情态，如需要，可能，愿意和怀疑等，有一定的意义，但不完整，必须和动词原形一起构成谓语，常见的情态动词有：can, could, may, might, must, ought to, shall, will, should, would，had better及半情态动词need, dare, be to do, have to , be able to 。
情态动词的主要特征：
1. 有一定的词义，但不能单独作谓语。它们要和行为动词或连系动词连用构成谓语。如： He may come tomorrow.
2. 没有人称与数的变化（have to/need除外）。
3. 后面接动词原形，即不带to的不定式（ought to, have to, used to本身带to）。
4. 具有助动词的作用，即可构成否定句、疑问句及用于简明答语。
Activity 2 Underline the modals and talk about their meanings.
dare not – be afraid to do something
needn’t – not be necessary to do something
have to – be necessary to do something
be able to – have the ability to do something
aren’t able to – don’t have the ability to do something
had better – give advice to do something
Step 3 Practice
have to
dare not
had better
needn’t / don’t have to
be able to
Step 2 Presentation
情态动词（Modal Verbs)
can / could / be able to
may / might
will / would
shall / should /ought to
must / have to
need/dare
had better
Function of models
ability 能力
possibility 可能性
advice 建议
agreement 赞同
guessing 猜测
necessity 必要性
permission 许可
prediction 预测
promise 许诺
request 请求
past habit 过去习惯
can/could
Jim isn't very good at maths or science, but he can speak English very well.
Our history test was so long last week that no one could finish it.
It was the last day of school, but the teacher said that we could not leave early.
The hunters have been lost for days. They could starve.
Could you please show me the way to Beihai Park
可能性
能力
请求
可能性
能力
may/might
What award did you get for the sports competition May I have a look
Our football team didn't play very well today, but we might do better tomorrow.
请求
许可
可能性
During the Spring Festival time the whole family will come for dinner.
My uncle was poor but liked fashion, so he would often dress up as a rich man.
Are you free this Saturday Would you like to join my family for dinner
will/would
许诺
请求
过去习惯
预测
The harvest festival begins on Saturday. We shall be there with our friends.
When going by plane, you should arrive at the airport at least one hour early.
It's nearly time for class to start. The teacher should be here soon.
shall/should
许诺
建议
预测
When you eat fish you must be careful with the bones.
Wang Feng has won the English competition three times. He must be very smart.
A man landed on Mars You must be joking. That can't be true.
must /can't
建议
必要性
猜测
猜测
may / might
1)表示许可(疑问句)。
表示请求，允许时， might 比may 的语气委婉。否定回答时，可用can 或 mustn’t, 表示“不可以，禁止，阻止”之意。
--- May I take this book out
--- Yes, you can. / No, you can’t (mustn’t).
2) 用于祈使句，表示祝愿
May you succeed!
3) 表示推测，可能（不用于疑问句）
The bottle looks blue. There may / might be some ink in it.
can / could
1) 表示能力或客观可能性
I can draw a horse in five minutes.
Man cannot live without air.
2) 表示请求或允许。could 表示请求时语气较委婉，主要用于疑问句，但回答时应用can
--- Could I call you by your first name
--- Yes, you can.
3) 用于否定句和疑问句，表示推测。
The young girl can’t / couldn’t be our new chairman.
Can the news be true
3. will / would
1) 表示请求，建议等， would 比will 委婉客气
Would you pass me the book
2) 表示意志，愿望和决心
I will never do that again.
3) would 可以表示过去反复发生的动作或某种倾向。
During the vacation he would visit me every week.
4) 表示估计或猜想
I thought he would have told you all about it.
4. shall / should
1) shall 用于第一、第三人称时，表示征求对方的意愿或向对方请求。
Shall we go for a picnic this weekend
2) shall 用于第二、第三人称时，表示说话人给对方的命令、警告、 允诺或威胁
You shall fail if you don’t work harder.
3) should 表示劝告、建议或命令
You should obey the rule in any case.
4) should表示推测
He should be at the reading room now.
5. must 和 can 的用法
1) must表示必须、必要或用以征求对方意见。回答must 引导的问句时，其否定回答要用needn’t 或don’t have to.
--Must we hand in our exercise books today
--Yes, you must. / No, you don’t have to (you needn’t).
2) must 表示推测，用于肯定句中。
This must be your pen.
Look! There’s a light on Dr. Baker’s office. He ______ be working in his office.
It _______sound strange, but it is true.
When I was young, I _______ sing for hours.
--When can I come for the photos I need them tomorrow afternoon.
--They ________ be ready by 12:00.
(5) Mr. Bush is on time for everything. How _____ it be that he was late for the opening ceremony
must
may
would
should
can
(6) A bear ______ not touch a dead body.
(7) --There were already five people in the car but they managed to take me as well.
--It ______ not have been a comfortable journey.
(8) Johnny, you ________play with the knife, or you may hurt yourself.
(9) Professor Wang, many students want to see you. _______ they sit here or outside
(10) --Are you coming to Jeff’s party
--I’m not sure. I ____________ go to the concert instead.
will
could
mustn’t
Shall
may / might
must have done 表示对已经发生事情的肯定猜测。“必定已经”
should / ought to have done 表示”本来应该做到,但实际未做到”，常含有责备口气。（否定形式表示”本不该做而做了”）
may / might have done, 本可以做而没做，突出可能性。
can/could have done 表示有能力或有可能做而实际没有做。
can’t / couldn’t have done, 表示对已经发生事情的否定猜测。
needn’t have done 本不必做的事却做了。
难点对比
1.I didn’t see her in the meeting room this morning,
She couldn’t have spoken at the meeting.
2. I didn’t hear the phone. I must have been asleep.
3. You should have told me about it earlier.
4. I could have helped you if you had asked me.
Step 3 Practice
have to
dare not
had better
needn’t / don’t have to
be able to
Thank You