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(共39张PPT)
Unit 8
It must belong to Carla.
Section A Grammar Focus 4a-4c
Learning Aims
To understand the inferential functions（推测功能） of modal verbs "must"，"could"，"might" and "can't".
To be able to use "must"，"could"，"might" and "can't" in different tenses to make inferences（推测）.
To know how to use general questions to make inferences（推测）.
To improve deducing（推理） ability.
Detectives(侦探) good at deducing(推理)
Bai Jingting is an excellent detective(侦探) in Who's the murderer.
How to be an awesome detective like him
To know how to deduce facts.
Task 1
Study what can be used to deduce facts
推理
What can be used to make inferences
（推测）
Mr Li has gone to Paris. He _______ be in Zhuhai.
Bob is sad.
He _________ get bad grades.
Lily didn't go to school today.
She ____________ be ill.
She is not here.
She______go out.
His name is on the book. The book _______be his.
must
must
can't
might/could
might/could
(must, can't, could, might) can be used to make inferences.
（推测）
Modal verbs
B. To show you think sth is probably true.
(you are very sure it is true)
A. To show you think sth is almost not true.
(you are very sure it is not true)
C. To show you think sth is possibly true.
(you are not sure it is true or not)
3. Allen didn't go to school today. He could be ill.
2. She has gone out. She can't be in the room.
4. I can't find my key. I might leave it at home.
1. The watch has Mary's name on it. It must belong to her.
Match the modal verbs（情态动词） with their functions（功能）
Now I want to see whether you can choose the right modal verb to deduce events.
Who does best at deducing（推理）
(小组为单位，越多成员站起来猜出正确的情态动词的小组获胜。)
He_____ be Iron Man.
must
He _______ be Yao Ming .
can't
This book _____ belong to
Li Li.
might/
could
Task 2 Study how to use modal verbs in different tenses（时态）
to make inferences（推测）
--B: She is crying. She _______________（可能取得了）bad grades in the math exam.
--A: What happened to Yang
might/could get
Look and say
-- A: It's 9:35 a.m. Where are they now
-- B: It's time for running on the playground.
They_______________ a class.
（肯定不是正在上课）
can't be having
Look and say
--A: Hu is not here. Where is he
--B: He doesn't feel well.
He __________________ the toilet.
（肯定已经去厕所了）
must have gone to
Look and say
Modal verbs can be used in different tenses
to make inferences（推测）
时态：
结构：modal verbs+V____
The crying girl might get bad grades.
They can't be having a class now.
He must have gone to the toilet.
一般现在时
时态：
结构：modal verbs+___+V____
时态：
结构：modal verbs+____+V__
现在进行时
原
ing
ed
现在完成时
be
have
After learning how to use modal verbs to make inferences（推测）,
Bai Jingting wants to know who can be the best detective（侦探）.
Next
Detective（侦探）Game（choose one picture and play the game）
detective Kenan
detective Fubu Pingci
detective Sherlock 1
detective Sherlock 2
detective Poiroi
detective Maoli
用所给单词的适当形式填空（2’）
It's 9:35 a.m now.
They _________________（run）on the playground.
must be running
返回
Translate the sentence（3’）
格林一家肯定已经去广州了。
The Greens______ ______ ______ _____
Guangzhou .
must have gone to
返回
--Where is Mom
--She has gone to the supermarket. She
________ now.
A. might shop B. must shop
C. could be shopping D. can't be shopping
Multiple Choice（3’）
返回
Fill in the blanks（1’）
Mary______be in the classroom because she has gone to Beijing.
can't
返回
Look and say（2’）
Miss Mo _____ _____shorter than Tao Zui.
must be
返回
Say the sentence loudly（2’）
We must be the best group.
返回
Task 3
Have a listening test
Now listen to the conversation between Bai Jingting and Lily, and answer the questions below.
Who were with Guigui in the meeting room just now
Can it be Zhao Liying taking the cheese cakes away and why
3. _______ might not take the cheese away because she
has eaten a lot of _________
可能是...
4. So who do you think might take the cheese cakes
away and why
_________ might take the cheese cakes away because he is _________ after playing _____________.
Now listen to the conversation between Bai Jingting and Lily, and answer the questions below.
Who were with Lily in the meeting room just now
Can it be Zhao Liying taking the cheese cakes away and why
Zhao Liying, Yang Mi and Cai Xukun
It can't be Zhao Liying
because she hates to eat cheese cakes.
可能是...
3. _______ might not take the cheese cakes away because she
has eaten a lot of __________.
4. So who do you think might take the cheese cakes
away and why
_________ might take the cheese cakes away because he is _________ after playing _____________.
Yang Mi
snacks
Cai Xukun
hungry
basketball
Task 4
Study how to ask general questions（一般疑问句） to make inferences（推测）.
The rules--general questions to make inferences:
________ + Subject + V ________
1. Bai Jingting isn't here.
Can he be at the office
2. There is a book on the desk.
Can it belong to Mary
3. Can they be playing tennis now
Observe and learn
Can
原
Observe and learn
The ansers to the general questions starting with "can"
1) to show you are sure sth is true: use _______
2) to show you are sure sth is not true: use________
3) to show you are not sure sth is true or not: use _________
1. Can Bai Jingting be at the office
2. Can it belong to Mary
3. Can they be playing tennis now
He must be at the office.
I see him go to the office to find He Jiong.
2. It can't belong to Mary.
Mike's name is on the book cover.
3. I am not sure. They might/could be playing tennis now.
must
can't
might
/could
Pair Work
There are some unkown objects left on the desk in front of the class. Talk with your partner about one of them and try to deduce（猜测） its owner.
unkown pink glasses
Sample dialogue
A: There is an unkown ... on the desk.
Can it belong to...
B: It might /must /can't belong to...because...
A: I think so. /I don't think so. I think it might /must /can't belong to...because...
unkown notebook
unkown watch
Task 5 Group Work: Track down the suspect X
The suspect X stole（偷走） our national treasure--Panda named Yuanyuan while she was sleeping. Bai Jingting wants you to find out the suspect X by working together in a group of 6.
游戏规则：由于大家前面出色的表现，每个小组都将获得关于嫌疑人X的其中一条线索（性别/眼睛/嘴巴/耳朵/鼻子/头发/眼镜）。集齐7条线索即可推理出嫌疑人X的大致样子。每个小组的成员只能通过两轮线索询问环节去询问其他小组问题，从而得出其他线索。（还有一条线索在美丽的Miss Mo那哦）
After collecting all 7 clues（线索）. You should finish the information card about the suspect X with its portrait.
Six students as a group:
1) S1,S2,S3 holds a clue and answer the questions from other groups.
2) S4,S5,S6 go to other groups to find out clues.
3) Work together to finish the information card and draw the picture.
4) The fastest group come to Miss Mo to check out the rules.
The fastest group win the game and get 5 badges!
Questions you can ask
1. What's your clue about
2. Can the suspect be a woman or a man
3. Can the suspect have…hair (long/short/color)
4. Can the suspect have...
(big/small eyes/ears/mouth/ nose)
7. Can the suspect be wearing... （glasses/...）
Group Work
Seven Clues
The suspect X must be a woman.
The suspect X might have long blonde hair .
The suspect X can’t have small eyes.
The suspect X must have a small nose.
The suspect X can’t have a big mouth.
The suspect X must have big ears.
The suspect X must be wearing glasses.
Task 6: Writing
Let's write a report about the suspect
You are extraordinary detectives like Bai Jingting!
Make full use of your deducing ability to help the unveil（解开）mysteries（神秘的事）around the world.
1. Function of inferential modal verbs
1)must: to show you think sth is probably true.
2)can’t: to show you think sth is almost not true.
3)might/could: to show you think sth is possibly true.
3. The general questions: Can+Subject+V原…？
Answers: Subject must…
Subject can’t…
Subject might/could…
2. Inferential modal verbs in different tenses:
一般现在时：must/can't/could/might+V原
现在进行时：must/can't/could/might be+Ving
现在完成时：must/can't/could/might have+Ved

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