Unit 8 It must belong to Carla.Section A Grammar Focus-4c 课件 人教版九年级英语全册 (共31张PPT)

(共31张PPT)
Grammar Focus~4c
Unit 8 It must belong to Carla.
Lead in
My name is Mary. There is a picture of my family. Do you know whose bedroom it is
It ________ Mary’s.
It ________ Mary’s sister’s.
It ________ Mary’s parents’.
may be
must be
can’t be
Let’s guess. Who is the person
be good at dancing
a member of TF boys
famous
He might / could be ______.
He must be _________.
Yi Yangqianxi
Who is the person
director
got married
be good at kongfu
He can’t be _______.
He must be _______.
Wu Jing
Presentation
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.
情态动词表推测
表示可能、怀疑、允诺、愿望、义务、必要、猜测等的动词就是情态动词。情态动词可以表示说话人的语气或某种情态，也可以表示推测。英语中表示肯定推测的情态动词主要有 must, can, could, may, might，否定推测can’t 。
肯定推测：
must ：表一定，表示把握大的肯定推测
may/ might/ could : 表也许，可能，表示没有把握的肯定推测
can’t/ couldn’t ：不可能 ，表示有把握的否定推测。
可能性： must > can/could > may/might
can not (can’t)
could not (couldn’t)
may not
might not
100%
probably true
20%~80%
possibly true
0%
almost not true
一定
可能
不可能
Grammar
1. must表示可能性最大的肯定推测，意思是“一定、准是”。含有must的句子（表推测）变为否定句时，要用can’t。
must一般疑问句的否定回答用needn’t或don’t have to，而不用mustn’t。
mustn’t意为“不可以，不能”，表示禁止，不许可
He must know the answers. /He can’t know the answers.
2. can可表示能力/允许/可能性/怀疑猜测，意为“可以，会，能”；can’t意为“不会，不能，不可以,不可能”
could为can的过去式；could还可用于现在时态中表示委婉客气，相当于can；could也可表示惊讶怀疑，不相信。
He can’t pick her schoolbag up.
They can be reading in the library.
3
情态动词：may , might, could
“可能”
表示不确定的猜测
She may be a teacher.
The dictionary might be Jenny’s.
The book guitar could be Jenny. She plays the guitar.
辨析
She may be a teacher.
Maybe, you are right.
may be
maybe
情态动词+be动词
副词
谓语结构
He may be in the office.
Maybe he is in the office.
基本特征
1. 有词义，但不能单独作谓语，须和动词原形一起构成谓语
2. 一般无人称和数的变化，have to有人称和时态的变化
3. 在情态动词后+not变否定，把情态动词提到主语前面变一般疑问句
They can walk to school.他们可以走路去上学。
否定：They can not walk to school.
一般疑问：Can they walk to school
4. 含情态动词的被动语态: 主+情态动词+be+done
I can speak English .
English can be spoken by me .
① she attended the concert.
It might be in the music hall.
It can’t be stolen.
② There is nothing valuable in it.
It could be at the park.
③ She went to the picnic with it.
She thinks somebody
must have picked it up.
④ She left early, before her friends.
modal verbs+ be/do sth.
inferences for the events of the present
modal verbs+have done sth.
inferences for the events of the past.
facts
inferences
确定的推测 含义 不确定的推测(可能性依次减弱) 含义
肯定句 一定；必定 可能
否定句 不可能 不大
可能
can和could也可以用于疑问句中表示推测。
1.Could he have finished the task
2.Can he be at home now
must
can’t＞couldn’t
He must know the answer to this question.
It can't be the headmaster. He has gone to America.
can＞could＞may＞might
may not＞might not
He could know the answer to this question.
He may not/might not know the scientist.
不同形式的情态动词表示不同的含义
情态动词+动词原形 表示对现在事情的推测
情态动词+be+动词-ing
情态动词+have+动词的过去分词
表示对正在发生的事情的推测
表示对过去情况的推测
This book must be Jim’s because his name is on it.
My mother might be cooking in the kitchen.
The ground is wet. It must have rained last night.
句式 结构 示例
对现在或未来的推测 He must have a car now.
It could be Mei's hair band.
对此时此刻正在进行的动作的推测 He must be doing his homework at home.
They can’t be reading in the library.
对过去发生事情的推测 He must have finished the work.
He can’t have gone to Shanghai.
情态动词+ do/be
情态动词 + be doing
情态动词+ have done/been
情态动词表推测
选择题：
1. — He _______be in the classroom. I think.
— No, he ________be in the classroom. I saw him go home a minute ago.
A. can; may not B. must; may not
C. may; mustn’t D. may; can’t
2. —Whose book is this
—It ___________ our geography teacher's. You see, his name is on it.
A. can't be B. can be C. mustn't be D. must be
D
D
选择题：
3. —Difficulties always go with me!
—Cheer up! If God closes a door in front of you, there _____ be a window opened for you.
A. would B. must C. could D. can
4. —Whose T-shirt is this
—It ___________ be John's. It's ___________ small for him.
A. can't; much too B. can't; too much C. mustn't; too much
B
A
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.
Choose the best way to complete each sentence using the words in the brackets.
might be
must be
4a
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.
could be
can’t be
must be\could be
1 Fill in the blanks with must, might, or can't.
1. That bright light ______ be a UFO-there’s no such thing!
2. I’m still waiting for the bus, so I ______ be a bit late for the party.
3. That sweater _____ be Carla’s. She’s the only one who wears such colorful clothes.
can’t
might
Practice
没有这样的东西！
等待
有点；稍微
must
唯一一个
引导定语从句
如此鲜艳的衣服
such+a/an+adj.+单数名词
such+adj.+复数名词
1 Fill in the blanks with must, might, or can't.
4. Tony ______ want to go to the concert. He likes music, but I’m not sure if he likes rock music
5. The person you saw at the supermarket _____
be Susan. I just talked to her on the phone and
she’s at work right now.
Practice
might
去听音乐会
“是否”，引导宾语从句
摇滚乐
can’t
定语从句
talk to sb. on the phone通过电话与某人交谈
在工作
立刻；马上
Complete these responses.
4b
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 crowded.
B: The food ________________.
4. A: Whenever I try to read this book, I feel sleepy.
B: It can’t ___________________.
cold
having a cold
must be delicious
be interesting
modal verbs+ be doing sth.
inferences for the events that are happening.
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.
4c
单词 词性 含义 用法 例句
sleepy 形容词 困倦的；瞌睡的 既能作定语，也能作表语 Do you know the sleepy girl
I’m too sleepy to finish my report.
asleep 形容词 睡着的 通常作表语；常和be或fall搭配使用 If I am asleep on the bus, please wake me up when you get off the bus.
sleepy & asleep
Translate : 她如此困以至于在英语课上睡着了。
She was so sleepy that she fell asleep in English class.
I. 根据语境及括号内所给单词的提示填空。
1. There are many _____________(laboratory) in our school. And the largest one was built last year.
2. Of the two ________(coat), Wendy will choose the cheaper one.
3. Larry had to drink coffee every night, or he would feel too _________(sleep) to finish his work.
sleepy
laboratories
coats
II. 根据汉语意思完成英语句子, 每空一词。
1. 现在埃米正在洗淋浴。请一会儿给她打电话。
Amy is _______ _______ _______ now. Please call her later.
2. 昨晚格雷格咳嗽得很厉害，因此今天早晨他去看医生了。
Greg ________ ______ ______ last night, so he went to see the doctor this morning.
taking a shower
coughed a lot
1. — Excuse me. Is this the right way to the Summer Palace
— Sorry, I am not sure. It _____ be.
A. might B. will C. must D. can
2. — Isn't that Ann's husband over there
— No, it _____ be him .I'm sure he doesn't wear glasses.
A. can't B. must not C. won't D. may not
3. You ____ be tired .you've only been working for an hour.
A. must not B. won't C. can't D. may not
4. — Is John coming by train
— He should, but he _____ not. He likes driving his car.
A. must B. can C. need D. may
5. This pair of glasses _____ be Tony's. He's the only one
who wears glasses.
A. must B. might C. can’t
6. —Will Jim fly to Taiwan for a holiday
—He _____ try. In fact, it depends on how much the
journey costs.
A. may B. has to C. need D. must
7. —Is the man in the car John
—No, it _____ be him. He went to Xi'an on business
yesterday. A. can't B. must C. mustn’t D. could
8. —I saw Susan in the library just now.
—No, it _____ be her. She went to Shanghai this morning. A. must B. can’t C. may D. needn’t
1. must, can /could, may /might等情态动词表推测
肯定推测：
must, can / could, may / might都可以表示肯定推测
must 表示把握性极强的推测，意为“肯定、一定”
can / could和 may / might表示把握性不大的推测，意为“也许、可能”。
否定推测：
can’t 意为“不可能”，表示很有把握的否定推测
may not意为“可能不”，表示把握性不太大的否定推测
Summary
Bye-bye!