(共21张PPT)
Unit 8 A 2d&Grammr-4c
人教版九年级全册
Content
Learning objectives
01
Lead-in
02
Presentation
03
2d&Grammar
04
Summary
05
Homework
06
目录
Learning objectives
After learning this lesson, you can:
make inferences by using must/can/could/may/might/can’t.
Free talk
Guess who she is.
She must/may/might/could/can’t be _____.
Presentation 2d
Look at the picture and answer the questions.
1. How does Linda look
She looks worried.
She might lose her schoolbag.
2. What might happen
Presentation 2d
1. Why is Linda worried
2. What are there in her schoolbag
3.Does Linda think her schoolbag is lost Why
Because she can’t find her schoolbag.
Her books, her pink hair band and some tennis balls.
No. She thinks her friends must have picked it up.
Presentation 2d
Linda: Mom, I'm really worried.
Mom: Why What's wrong
Linda: I can't find my schoolbag.
Mom: Well, where did you last put it
Linda: I can't remember! I attended a concert yesterday
so it might still be in the music hall.
Mom: Do you have anything valuable in your schoolbag
Linda: No, just my books, my pink hair band and some tennis balls.
Mom: So it can't be stolen.
Linda: Oh, wait! I went to a picnic after the concert. I remember I had my schoolbag with me at the picnic.
Mom: So could it still be at the park
Linda: Yes. I left early, before the rest of my friends. I think somebody must have picked it up. I'll call them nowto check if anybody has it.
Role-play 2d.
Why What’s wrong
I can’t find my
schoolbag.
Mom, I’m really worried.
Key points 2d
怎么了？=What’s up =What’s the matter/trouble/problem
Linda: Mom, I'm really worried.
Mom: Why What's wrong
Linda: I can't find my schoolbag.
Mom: Well, where did you last put it
Linda: I can't remember! I attended a concert yesterday
so it might still be in the music hall.
Mom: Do you have anything valuable in your schoolbag
Linda: No, just my books, my pink hair band and some tennis balls.
Mom: So it can't be stolen.
Linda: Oh, wait! I went to a picnic after the concert. I remember I had my schoolbag with me at the picnic.
Mom: So could it still be at the park
Linda: Yes. I left early, before the rest of my friends. I think somebody must have picked it up. I’ll call them now to check if anybody has it.
参加音乐会
在音乐厅
有价值的东西
去野餐
在野餐
其余的
肯定已经捡走了
Grammar Focus
Whose volleyball is this It must be Carla’s. She loves volleyball.
Whose hair band is this It could be Mei’s hair band. Or it might belong to Linda. They both have long hair.
What did you see that night I’m not sure, but it can’t be a dog. It was bigger. I think it might be a bear or a wolf.
情态动词表示推测
Grammar Focus
句式 情态动词 含义 用法
肯定句 must 一定 表示有把握的肯定推测。
may/ might/ could 也许；可能 表示没有把握的肯定推测。
否定句 can’t/ couldn’t 不可能 表示有把握的否定推测。
may not/ might not 可能不 表示不太有把握的肯定推测。
疑问句 can/ could 可能 表示推测。
情态动词表示推测的意义和用法
Practice
4a
Choose the best way to complete each sentence using the words in brackets.
1.A:Where’s Jean
B:I’m not sure. She______________(is/might be/must be) in the laboratory.
2.A:Everyone is going to the pool after school.
B:Really It______________(must be/can’t be/could be) hot outdoors.
3.A:That’s the phone.
B:Hmm. I wonder who it_______________(must be/could be/should be).
4.A:I wonder if these are Jim’s glasses.
B:They______________(can’t be/might be/could be) his. He doesn’t wear glasses.
5. A:I hear water running in the bathroom.
B:It______________(could be/must be/can’t be) Carla. She was thinking of taking a shower.
might be
must be
could be
can't be
must be
在实验室
在户外
hear sb. doing sth听到某人正在做某事
Practice
4b
a theme park
Complete these responses.
1.A:Many people are wearing coats.
B:The weather must be_________________________________.
2.A:Sally has been lying in bed all day.
B:She might be_______________________________________.
3.A:This restaurant is always very crowded.
B:The food__________________________________________.
4.A:Whenever I try to read this book, I feel sleepy.
B:It can't____________________________________________.
very cold
having a bad cold
must be delicious
be interesting
感到困倦
Practice
4c
Look at this picture of a room.How much can you tell about the person who lives here Is it a boy or a girl What are his/her hobbies Discuss your ideas with a partner.
A: It could be a girl’s room because it’s very tidy.
B: I guess so . But it might be a boy’s room because the clothes look like boys’ clothes.
Key points
a theme park
attend, join, join in, take part in 都有 “参加” 的意思。
区别是：
attend 主要指“到场”或“出席”会议、宴会、典礼、仪式等。
join 指参加某团体或组织成为其中一员或参加活动,是非正式用语。
join in表示“加入；参加(某种活动)”，in之后接名词或v.-ing形式；表示“参加某人的某种活动”时，可用join sb. in (doing) sth. 。
take part in指参加一项工作, 在其中分担一部分, 也指参加活动并积极工作。
Exercise
a theme park
一、选用 must, might, could, can’t 填空
1.The textbook ___________be his. It has his name on it.
2.The trousers ___________be Jim’s. They are too long.
3.The guitar ___________belong to Sam. He plays the guitar.
4.The toy ___________be Bob’s. He is the only little kid.
二、单项选择
( )1.The iPad isn't _______.It belongs to _______.
A.he;me B.his;me C.hers;mine D.her;mine
( )2.—David!Is that man your head master —It_______be him.He is having a meeting.
A.mustn't B.can't C.won't
must
can't
might/could
must
B
B
Exercise
a theme park
( )3.—Look at the boy playing basketball on the playground. Is it George
—It ________ be him. He told me he would play basketball after class,
but he's not sure.
A. mustn't B. must C. can't D. may
( )4.—I don't know ________ book this is.
—It may________.
A. who; is Alice B. whom; is Alice's
C. whose; be Alice's D. who's; belongs to Alice
D
C
Summary
1.怎么了？
2.参加音乐会
3.在音乐大厅
4.有价值的东西
5.这不可能被偷。
6.去野餐
7.我其余的朋友
8.捡起
What’s the matter/trouble/problem
What’s wrong/up
attend the concert
in the music hall
something valuable
It can’t be stolen.
go to the picnic
the rest of my friends
pick up
Homework
1. Recite 2d.
2. Recite the grammar.
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