人教版九年级英语第八单元Unit 8 It must belong to Carla.Section A 最新(共26张PPT)

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名称 人教版九年级英语第八单元Unit 8 It must belong to Carla.Section A 最新(共26张PPT)
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科目 英语
更新时间 2022-10-10 14:54:07

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(共26张PPT)
Section A
Period Three
laboratory
outdoors
coat
sleepy
n. 实验室
adv. 在户外;在野外
n. 外套;上衣
adj. 困倦的;瞌睡的
Words Review
To learn to use must, might, could and can’t for making inferences
It must be Carla’s.
It could be Mei’s hair band.
I’m not sure, but it can’t be a dog.
A: Whose volleyball is this
B: It must be Carla’s. She loves volleyball.
A: Whose hair band is this
B: It could be Mei’s hair band.
A: What did you see that night
B: I’m not sure. But it can’t be a dog. It was bigger. I think it might be a bear or a wolf.
Read the sentences below and pay attention to the red words.
1. A: Whose volleyball is this
B: It ______ be Carla’s. She loves
volleyball.
2. A: Whose hair band is this
B: It ______ be Mei’s hair band.
3. A: What did you see that night
B: I’m not sure. But it _____ be a dog.
It was bigger. I think it ______ be
a bear or a wolf.
must
could
can’t
might
Ready
表推测的情态动词
情态动词must, can, may, could, might都
可以表示推测。
◆must表示对现在的状态或现在发生的事情很有把握的推测, 意为“一定; 准是”,可能性为100%。 如:
You have studied for a long time. You
must be tired.
◆may, could, might这三个词表示的可
能性较小, 意为“有可能; 也许”, 可能性占20%至80%。 如:
My friend has lost his watch. This may /
might / could be his, but I’m not sure.
◆can’t 表示很有把握的否定推测, 意为“不可能”, 可能性为0%。 如:
The blue motorbike can’t be your
mother’s. Hers is yellow.
表推测情态动词的用法
一、根据被推测的时间,确定动词的形式。
— Good morning. I’ve got an appointment with Miss Smith in the Personnel Department.
— Ah, good morning. You must be Mrs. Brown.
“情态动词+do”形式:表示对现在
或将来情况的推测。
— Tom is never late for work. Why is he absent today
— Something must have happened to him.
2. “情态动词 + be + doing”形式:表示对此时此刻正在发生的事情的推测。
He may/might be waiting for us at home.
3. “情态动词+have done”形式:表示对过去情况的推测。
二、根据猜测语气的强弱,选择情态动词。
在肯定句中表推测,
must语气最强, 表示“肯定,一定”;
could, may, might语气依次减弱,表示“可能, 也许”。
Some people who don’t like to talk much are not necessarily shy; they may just be quiet people.
2. 在否定句中表推测,
can’t, couldn’t语气最强,表示“不可能”;
may/might not语气较弱,表示“可能不”;
mustn’t 表示“禁止”,不用于否定推测。
You can’t be hungry already — you had lunch only two hours ago!
must表推测只用于肯定句,如果要表示否定意义,则要用can’t;
can表推测多用于否定句和疑问句,而用于肯定句一般指“客观可能性”,说明人或事物一时的特点。
三、某些情态动词表推测时的用法限制。
e.g. Tigers sometimes can be very kind.
1. — I saw Lily in the supermarket this
morning.
— Oh, it ______ be her. She moved to
Australia the day before yesterday.
2. After a long walk, the children ________
be very tired now.
3. John __________ go with us tomorrow, but he isn’t sure.
can’t
must
may/might
Use proper modal verbs to fill in the blanks.
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.
might be
must be
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.
can’t be
could be/must be
could be
4b
Complete these responses.
1. A: Many people are wearing coats.
B: The weather must be ______________
____________.
2. A: Sally has been coughing a lot.
B: She might be ____________________.
3. A: This restaurant is always very crowed.
B: The food _____________________.
4. A: Whenever I try to read this book, I feel sleepy.
B: It can’t __________________.
getting colder
having a sore throat/ill
must be delicious
be that boring
/cold outside
I wonder if these are Jim’s glasses.我想知道是否这些是吉姆的眼镜。(4a)
【解析】 wonder v /n 希望知道;惊奇;奇迹
(=want to know)
→ wonderful adj. 奇妙的
→wonderfully adv. 非常好地
Chinese Women’s Volleyball team played ____________(wonder) in the match
No wonder + 句子 “难怪.....”
No wonder you are angry. 难怪你觉得生气。
Whenever I try to read this book, I feel sleepy 每当我试着读这本书的时候,我感到瞌睡。(4b)
sleepy adj. 困倦的;瞌睡的
【解析】 sleep (slept; slept) v“睡觉”
sleepy adj. “困倦的;疲惫的” 可做表语和定 语 feel sleepy 感到疲倦
sleeping “正在睡觉的“可做定语和表语
the sleeping baby 熟睡的婴儿
asleep “睡着的”, 只做表语 fall asleep 入睡
1) If you stay up too late, you will feel ______ (sleep) in class
the next day..
2)Keep quiet, kids, Dad ____________(sleep) in the next room.
— OK , Mum.
3)David fell__________(sleep) in class because he stayed up too late
last night.
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.
思考题:
1.can与could的区别
2.may与might的区别,以may为首的一般疑问句该怎么否定回答?
3.must与have to 的区别;以must为首的一般疑问句该怎么否定回答?
4.maybe= may be 吗?
can与be able to 怎么使用?
肯定式 否定式 其他用法
can
能,会
可能 can’t
不能,不会
不可能(不会) 1.在口语中can 可以代替may,同理,could也可代替might。
2、Could you please… 委婉语气。
3、表示否定猜测,用can’t be(不可能)。
could can的过去式 couldn’t 不能,不会
不可能(不会)
may
可以
可能 mustn’t/
can’t 不可以,不应该
不许可
might may的过去式(可能性更小) may not,
可能不(表猜测)
must 必须
应当
一定
准是 needn’t 不必
不用 表示说话人对事物的肯定推测时常用must be。
have to 有各种时态。
mustn’t 不准
禁止
have to 不得不 don’t have to 没必要这么做
1. Choose the best answer
1. Must I be back home before 6 o’clock
----No, you____. But don’t be too late.
A. can’t B. mustn’t C. needn’t D. won’t.
2. Mary ____ be in Paris. I saw her in town only a few minutes ago.
A. mustn’t B. shouldn’t
C. can’t D. may not
C. can’t
中考一链
C. needn’t
3. Peter ____ come with us tonight, but he isn’t very sure yet.
A. must B. may C. can D. will
4. I thought you ____ like something to read, so I have brought you some books.
A. may B. might
C. could D. must
B. may
B. might
1. — Whose T-shirt is this
— It ______ be John’s. It’s much too
small for him.
2. The magazine _____ be Lily’s, for
we can find her name on the cover.
3. The man ______be my English teacher. He has gone to Canada.
4. — Difficulties always go with me!
— Cheer up! If God closes a door in front of you, there ______ be a window opened for you.
can’t
must
can’t
must
Use proper modal verbs to fill in the blanks.
5. — Who’s singing in the garden
— It _____ be Mr. Brown. He always practices singing at this time.
6. — Is the man over there Mr. Brown
— It _____ be him. He has gone to Brazil to participate in a conference.
7.The woman _____ be our English teacher. She has gone to Canada.
8.-He ________ be in the classroom, I think.
-No, he _____ be in the classroom. I saw him go home a minute ago.
must
can’t
can’t
can’t
may/might
Review the grammar we’ve learnt today.
Finish the exercises in Learning English.
Preview the new words and expressions.
Preview 1a-1d on page 61.
Homework