外研版（2019）必修二 Unit 2 Let's celebrate! Using language 课件(共36张PPT)

(共36张PPT)
Unit 2
Let’s celebrate!
Using language
Michelle
Modals（2）
can/could
may/might
must
Look at the sentences from the reading passage and answer the questions.
a That is why Letters from Father Christmas could be the perfect book…
b The children must have been very excited as they opened it.
c … they might not receive their presents if they were not good.
01
Discovering the rules
1) What do the words in red indicate: an order, a request, ability or possibility
The words in red indicate possibility.
v. 表明, 显示
n. 请求, 要求
a That is why Letters from Father Christmas could be the perfect book…
b The children must have been very excited as they opened it.
c … they might not receive their presents if they were not good.
01
Discovering the rules
2) Will the meaning of sentence (a) change if we replace “could” with “must” or “might”
If we replace “could” with “must”, the meaning of sentence (a) will change. It means the speaker is quite sure about the statement. If we replace “could” with “might”, the meaning of sentence (a) will remain more or less the same. “Could” and “might” in affirmative sentences have a similar meaning when indicating possibility.
a That is why Letters from Father Christmas could be the perfect book…
b The children must have been very excited as they opened it.
c … they might not receive their presents if they were not good.
01
Discovering the rules
3) What happens if we change “must” and “might” in sentences (b) and (c) into “could”
If we change “must” in sentence (b) into “could”, it means the speaker is not sure about the statement, and it’s only a possibility. If we change “might” in sentence (c) into “could”, it means it’s impossible for the children to receive presents.
a That is why Letters from Father Christmas could be the perfect book…
b The children must have been very excited as they opened it.
c … they might not receive their presents if they were not good.
01
Discovering the rules
Look for more sentences with modals in the reading passage.
1) Who could it be from
2) The letters were also beautifully illustrated --- each must have taken its true author, Tolkien, a long time to complete.
3) In another letter, Father Christmas complained about how he could not stop his helpers playing games with the toys instead of wrapping them up.
4) … we can all share the true spirit of giving at Christmas time.
01
Discovering the rules
情态动词must, can/could, may/might均可表示推测, 它们可以对过去、现在或将来的情况作出语气强弱不同的推测。
表示肯定的推测时：
各情态动词语气从弱到强依次为
might → may → could → can → must；
把握推测语气的特点，选择恰当的情态动词。
02
Studying the rules
表示否定的推测时：
can’t / couldn’t语气较强，意为“不可能”；
may not / might not语气较弱，意为“可能不”。
must的否定形式mustn’t不表示否定推测，而是表示“不许可”或“不应该”。
02
Studying the rules
△情态动词表示推测时, 在用法上有一些限制:
① must只用于肯定句中，意为“一定，准是”。如:
This must be your room.
② could多用于否定句和疑问句中。如：
He looks young. He couldn’t be over 50.
Could it be true
③ may / might用于肯定句和否定句中。如：
They may not know his address.
She told me that she might go to Hawaii this winter.
02
Studying the rules
确定被推测时间，正确判断动词时态。
1. 对现在或将来的情况进行推测时，用“情态动词+ do”。
You must be Mr. Smith. I was told to expect you.
Our team might win the race.
02
Studying the rules
2. 对此时此刻正在进行的情况进行推测时，用“情态动词+ be +动词-ing形式”。
She may be waiting for you in the entrance hall at the moment.
The police are stopping all cars. They must be looking for the escaped prisoner.
02
Studying the rules
3. 对过去的情况进行推测时，用“情态动词+ have done”。
“情态动词+ have done”是高考的热点，在做此类题时，要仔细体会题干中所提供的信息，尤其注意题干中给出的时态。
I didn’t see Alex. He might have gone home.
I couldn’t have left my bag on the bus.
They must have gotten lost or they’d be here by now.
02
Studying the rules
must have done
一定，想必。表示对已经发生的事情的肯定推测，语气较强。
It must have rained last night. The ground is wet.
may / might have done
可能已经，或许已经。表示对已经发生过的情况的肯定推测，语气稍弱。
He may / might have given you more help, even though he was busy.
could have done
不可能。表示对过去发生的否定推测。
They can’t have gone out, because the light is on.
can’t / couldn’t have done
表示过去本来能够做某事而实际上没有做
He could have passed the exam, but he was too careless.
(At a fancy dress party)
Chris: I spent ages putting up all the balloons and flowers last night.
Jean: I expect you are feeling tired now!
Chris: Yes, I am. Look that guy is dressed as Batman. Is that Mike
Jean: It’s possibly him. Check out that girl over there. I’m sure that’s Lucy.
Chris: No, I don’t think that’s Lucy. Lucy isn’t that tall.
Jean: Look at those two guys dressed as chickens!
Oh, they’re waving at us!
Maybe they’re from our school.
Chris: Let’s go and find out.
You must be tired now!
It may/might/could be him.
That must be Lucy!
that can’t be Lucy!
They may/might/could be from our school.
Rewrite the underlined sentences in the conversation using can/could, may/might and must.
03
Applying the rules
Look at the picture and make as many sentences as possible using can/could, may/might and must.
03
Applying the rules
Black Friday is one of the busiest shopping days of the year. Stores have big sales and open their doors very early.
The man with a wallet in his hand might be a bit unwilling to pay.
The woman in red must be very excited to buy so many things.
The woman with glasses may be very tired to get up so early and carry so many bags.
The cashier might be feeling uncomfortable as he is sweating a lot.
Lantern Festival celebrations
Underline the words and expressions about celebrations during the Lantern Festival in the speech bubbles and complete the mind map.
hold a lantern fair
parade
have a reunion dinner
a red envelope
a scarf
hold a lantern riddles
competition
let off fireworks
a dress, chocolates…
dumplings
noodles
...
banners
flowers
rice balls
posters
balloons
flowers
To celebrate..., we often drink /eat.., give... as gifts, decorate with...
Describe a festival celebration using the words and expressions you have learnt.
To celebrate the Mid-Autumn Day, we usually have a few days off. It is a great occasion for a family to get together. During the festival, we often drink some wine. Besides, there is a kind of traditional Chinese food—moon cakes. The whole family usually admire the moon as they eat moon cakes. People often visit their friends and relatives with some delicious moon cakes and some fresh fruits. This festival is one of the most important festivals in China, which is held to celebrate the harvest, so no matter how busy they are, people usually have a thorough cleaning and decorate their house with some beautiful pictures about moon and so on.
A festival invitation
Invitation
If you receive a written invitation for formal events, which of the following would be the appropriate reply
A. Making a phone call.
B. Sending a text.
C. Writing a letter.
Which of the following behaviors is most likely to be inappropriate when you visit somebody
A. Arriving on time.
B. Arriving half an hour earlier.
C. Arriving twenty minutes late.
Listen to the conversation and complete the sentences with the correct ending.
b
c
f
Listen again and complete the notes.
Occasion: a 1_________________ party
When: the fourth 2_________________ in 3_________________
Where: Tony’s 4_________________
What to eat: a 5_________________ with all the side dishes and homemade 6_________________
What to bring: some flowers or 7_________________
What to wear: 8_________________
Thanksgiving
Thursday
November
apartment
big turkey
apple pie
candies
anything you like
Are you free…
Would you like to…
It’s the time to…
You can wear…
You can… if you like.
I’d love to…
It sounds great!
What else will we do
Do I need to…
what the speakers say to extend and accept an invitation.
Student A: Turn to Page 81.
Student B: Turn to Page 85.
Work in pairs. Act out the conversation about extending and accepting an invitation.
Work in pairs. Think about a similar situation and have a conversation.
Describe a festival celebration using the words and expressions you have learnt.
THANKS FOR WATCHING