(共35张PPT)
Unit 8 It must belong to Carla.
人教新目标版 九年级上
SectionA 2d
Grammar Focus-4c公开课
Warming-up
When we don't know the owner,we can guess by using :
肯 定：It/They must
有可能：It/They might/could
不可能：It/They can’t
must
100%
probably true
could
might
20%～80%
possibly true
can’t
0
almost not true
be sb’s.
= belong to sb.
情态动词 must, might, could, can’t 后接动词原形, 可以表示对现在的情况的推测。be+所有格与belong to可以表示所属关系。
Q1. Where are they
Q2.What’t their relationship
Q3. What happened
She may lost her schoolbag.
Could Linda’s schoolbag be stolen(被偷)
Let's read the conversation between them.
New drills
They might/could/must be….
Read 2d and answer the questions.
1. What’s the matter with Linda
2. What are there in her schoolbag
3. Could Linda’s schoolbag be stolen Why
She felt very worried.She can’t find her schoolbag.
Her books, her pink hair band and some tennis balls.
No, it can’t be stolen. There is not anything valuable in her schoolbag.
4.What did she do yesterday
5.Where did Linda last put her schoolbag
6 Could Linda’s schoolbag still be at the park Why
Her schoolbag might be at the park.
Yes. She left early, before the rest of her friends. She thought someone must have picked it up.
She attended a concert and went to a picnic.
attend a concert
It might be in the music hall.
nothing valuable
It can’t be stolen.
went to a picnic
It could be at the park.
left early, before the rest of friends.
Somebody must have picked it up.
last
Do you think that Linda will find her schoolbag
Yes.Because she'll call them now to check if anybody has it.
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 be still in the music hall .
Mom: Do you have anything valuable in your schoolbag
2d
Listen and repeat.
What's wrong 怎么了？
last作为副词，意为“最近；上一次”。
attend a concert
出席音乐会
something valuable
一些有价值的东西
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
have 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.
may/might/can’t/ could/must be+done
may/might/can’t/could/must +have done
1.I attended a concert yesterday so it might still be in the music hall.我昨天参加了一场音乐会，所以它有可能还在音乐厅里。
【词汇解读】attend vt. 出席；参加
attend是正式用语，侧重指参加会议、婚礼、典礼，去上课、上学、听报告等。
【活学活用】
1) 只有15个人出席这次会议。
2）我们都想去听李先生的报告。
Only 15 people attended the meeting .
All of us went to attend the lecture given by Mr. Li.
Language points
My mother attended an important meeting yesterday.
我妈妈昨天参加了一个重要的会议。
We are going swimming. Would you like to join us
我们要去游泳，你想跟我们一起去吗？
Will you join us in playing basketball
你会和我们一起打篮球吗？
I’m going to take part in the sports meeting.
我将要参加运动会。
【观察领悟】
attend 意为“出席；参加”，为正式用语，指参加婚礼、葬礼、典礼以及去上课、上学、听报告等
take part in 指参加某个会议或某项群众性的活动等，重在说明参加该项活动并在其中发挥一定的作用。
join 指加入某党派、团体、组织、俱乐部等并成为其中的一员。表示短暂性的动作，不与表示一段时间的状语连用。
join in 一般指参加竞赛、娱乐、游戏等活动，其后一般接名词或动词-ing形式。
【巧辩异同】attend， take part in，join或join in
2.Do you have anything valuable in your schoolbag 你的书包里有贵重的东西吗？
【词汇解读】 valuable形容词，意为“贵重的；很有用的；宝贵的”，在句中可用作定语，也可用作表语。用作表语时，可与介词to连用，常用短语be valuable to sb.“对某人来说很有价值”。anything valuable 一些贵重的东西。形容词valuable修饰不定代词anything要后置。当形容词修饰不定代词(something, anything, nothing等)时，形容词应放在不定代词的后面。
【活学活用】1) 这一经历对我很有用。
2） 他在教育问题上给我们提了宝贵的建议。
This experience is valuable to me.
He gave us valuable advice on the problems of education.
4. I think somebody must have picked it up.
我想一定有人捡到。
【词汇解读】 pick up意为“拿起；捡起”。它是由“动词+副词”
构成的短语，当其宾语是名词时，该名词即可位于up之后，
也可位于pick与up 之间；当其宾语是代词时，该代词必须
位于pick 与up之间。另外pick up 还有（开车）接人; (偶然) 学会的意思。
【活学活用】
1) 我的尺子在你的桌子下面，能请你帮我捡起来吗？
2） 把纸捡起来然后丢在垃圾桶里。
My ruler is under your desk. Could you pick it up for me
Pick up the paper and put it in the dustbin.
must have picked it up是“must+have+过去分词”的结构， must在此处表示推测, 意为“一定”。当情态动词后接have done时, 表达对过去的事情进行推测, 故must have done something表示“过去一定做过了”这样的意思。
—Linda has gone to work, but her bicycle is still here.
琳达已经去上班了，但她的自行车还在这里。
—She must have gone by bus.
她一定是乘公共汽车去的。
He might/could have arrived there.
他可能早就到那里了。
Linda’s really worried. She can’t find her schoolbag. She _________________ yesterday so it ___________ in the music hall. There wasn’t anything valuable in her schoolbag. So it ________ stolen. She _______________ after the concert. She remembered she had her schoolbag with her ____________. So it ______________ at the park. And she thought somebody must have _____________. Linda will call them now to check if anybody has it.
Fill in the blanks according to the conversation.
attended a concert
might still be
can’t be
went to a picnic
at the picnic
could still be
picked it up
Consolidation
Role-play the conversation.
Linda : Mom, I’m ...
Mom : Why What’s ...
Linda : I can’t ....
Mom : Well, where ...
Linda : I can’t remember ! I ....
Mom : Do you ...
Linda : No, just my books, ....
Mom : So it can’t ....
Linda : Oh, wait! I went .... I ...
Mom : So ...
Linda :Yes. I .... I.... I’ll...
Role play
1. 这是谁的排球
_______ __________ is this
这一定是卡拉的。她热爱排球运动。
It ______ be ________. She loves volleyball.
Whose volleyball
must Carla’s
2. 这是谁的发带？______ ____ ____ is this
它可能是梅的发带。或者可能属于琳 达。她们两人都是长头发。
It ______ be Mei’s hair band. Or it ______ belong to Linda. They _____ have long hair.
could
might
both
Whose hair band
Practice
Fill in the blanks.
3. 那晚你看见了什么？
_____ did you see that night
我不确定，但肯定不可能是狗。它更大。我想也许是一头熊或一匹狼。
I’m ___ ____, but it _____ ___ a dog.
It was bigger. I think it _____ ___ a bear
or a wolf.
What
not sure
can’t be
might be
Grammar Focus
Read the following sentences and find out the common features.
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
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
注意：
can 表示推测通常不用于肯定句
may 表示推测通常不用于疑问句
must 表示推测通常不用于否定句和疑问句
can不肯，may不问，must 不否问
He must be very happy when he heard the news.
He may be in his office but I’m not sure.
That man can’t be your teacher. He’s much taller.
It may not be right, but that’s what I think.
— Can the news be true
— No, it can’t be true.
情态动词表示推测的意义和用法
情态动词表示推测的意义和用法
（1）情态动词表示推测时，无时态区别，只有语气差别。表示推测的情态动词的语气强弱顺序如下（由强到弱）：
must ＞ can ＞ could ＞ may ＞ might
（2）含有must的句子（must表推测）变为否定句时，要用can’t
He must be at home. →He can’t be at home.
must，can，could，may和might+have +V.pp表示对过去发生事情的不同推测。
They are playing chess now. They must have finished their homework.
他们在下棋一定是完成作业了。
He may have known it already.他可能已知道了。
You might have caught a cold. 你也许感冒了。
不同形式的情态动词表示不同的含义
Look！She must be running for exercise.
must，can，could，may和might+be +V.ing表示对正在发生事情的不同推测。
亨利可能是在做梦。
Henry could be dreaming.
在反意疑问句中，当谓语动词含有must/might/can表推测意义时，疑问部分的助动词应与情态动词后面的动词在非推测情况下的用法一致。
The truck must be his, ______ he
Grace must have read the book last night, ______ she？
isn't
didn't
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
n. 实验室
adv. 在户外，在野外
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
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 ____________________.
getting colder/ cold outside
having a sore throat/ill
n. 外套
must be delicious
be that boring
adj. 困的
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 ______________.
sleep, sleepy & asleep
sleep, sleepy和asleep这三个词都与“睡觉”有关，但它们的含义和用法有区别。
单词 词性 含义 用法 例句
sleep 名词 睡眠 不可数名词 Just lie down and get enough sleep.
一次睡眠；一段睡眠时间 前可加a I’ll go upstairs and have a sleep.
动词 睡觉；睡 不及物动词 Did you sleep well last night
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.
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.
4c
Sample Dialogue
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.
https://www.21cnjy.com/help/help_extract.php中小学教育资源及组卷应用平台
Unit 8 It must belong to Carla.
SectionA 2d&Grammar focus-4c导学案
【学习目标】
掌握下列词汇：attend，valuable，pink，anybody，laboratory，outdoors，coat，sleepy
2．理解并熟练运用情态动词must，might，could和can't表示推测的用法和区别。
3．会运用上述单词和相关句型对事情进行合理推测。
【学习重难点】
【学习重点】
情态动词表推测的用法和区别。
【学习难点】
情态动词表否定推测的用法和区别。
【自主预习】
一.完成句子。
1. 这是谁的排球 _______ __________ is this
这一定是卡拉的。她热爱排球运动。It ______ be ________. She loves volleyball.
2. 这是谁的发带？______ ____ ____ is this
它可能是梅的发带。或者可能属于琳 达。她们两人都是长头发。
It ______ be Mei’s hair band. Or it ______ belong to Linda. They _____ have long hair.
3. 那晚你看见了什么？
_____ did you see that night
我不确定，但肯定不可能是狗。它更大。我想也许是一头熊或一匹狼。
I’m ___ ____, but it _____ ___ a dog.It was bigger. I think it _____ ___ a bear or a wolf.
小试牛刀
情态动词 用法 例句
must 对现在情况的肯定推测“一定；肯定”（用于肯定句）“必须”Must I的否定回答为needn’t… You _____be very tired after a long journey._______ I hand in the report today --No, you _______. You can do it tomorrow.
mustn’t “禁止；不允许” You _______ go across the road when the traffic light is red.
can 表能力“会”；表许可“可以”； 表疑惑或惊讶； She _______speak English，but she can’t speak French.You _______ /may go now._____he be serious 他难道是认真的吗？
can’t 表示否定推测“一定不”，“不可能” I saw your father yesterday.--It _______ be him. He has gone to the US.
could 表示各种可能性：表委婉请求；表推测“可能，也许”；表过去能力； -_______ I borrow your bike -Yes, you _______. (不可用could回答)The pen _______/might belong to her.I _______ swim when I was five years old.
may 表示把握不大的推测，不用于疑问句。may not”可能不” _____I watch TV for a while 表征求许可-Yes, you may/can. -No, you can’t/mustn’t.
might 比may的可能性更小 Li Ming _______ get here in time, but I am not sure.
should 表建议；表虚拟语气should have done本应该做什么却没做” I think you _______ stay at home and study.He _______ have come here. 他本应该来这儿。（事实是他没来）
would 表意愿 “愿意” -Could he help me -I’m sure he _______.
注意：推测程度可能性大小排列顺序为：must＞should＞could＞may＞might＞can’t
【合作探究】
探究一: 完成教材2d的任务
1.读2d对话，并回答下面问题。
1). What’s the matter with Linda
2). What are there in her schoolbag
3). Could Linda’s schoolbag be stolen Why
4).What did she do yesterday
5).Where did Linda last put her schoolbag
6) Could Linda’s schoolbag still be at the park Why
2. 读对话，并分组进行角色扮演。并在全班面前展示。
3.知识点讲解。
1)attend vt. 出席；参加
attend是正式用语，侧重指参加会议、婚礼、典礼，去上课、上学、听报告等。
【活学活用】
只有15个人出席这次会议。
我们都想去听李先生的报告。
【巧辩异同】attend， take part in，join或join in
2) valuable形容词，意为“贵重的；很有用的；宝贵的”，在句中可用作定语，也可用作表语。用作表语时，可与介词to连用，常用短语be valuable to sb.“对某人来说很有价值”。anything valuable 一些贵重的东西。形容词valuable修饰不定代词anything要后置。当形容词修饰不定代词(something, anything, nothing等)时，形容词应放在不定代词的后面。
【活学活用】 这一经历对我很有用。
他在教育问题上给我们提了宝贵的建议。
3)pick up意为“拿起；捡起”。它是由“动词+副词”
构成的短语，当其宾语是名词时，该名词即可位于up之后，
也可位于pick与up 之间；当其宾语是代词时，该代词必须
位于pick 与up之间。另外pick up 还有（开车）接人; (偶然) 学会的意思。
【活学活用】
我的尺子在你的桌子下面，能请你帮我捡起来吗？
把纸捡起来然后丢在垃圾桶里。
注：must have picked it up是“must+have+过去分词”的结构， must在此处表示推测, 意为“一定”。当情态动词后接have done时, 表达对过去的事情进行推测, 故must have done something表示“过去一定做过了”这样的意思。
4. 根据对话完成下面短文。
Linda’s really worried. She can’t find her schoolbag. She _________________ yesterday so it ___________ in the music hall. There wasn’t anything valuable in her schoolbag. So it ________ stolen. She _______________ after the concert. She remembered she had her schoolbag with her ____________. So it ______________ at the park. And she thought somebody must have _____________. Linda will call them now to check if anybody has it.
探究二 、语法精讲。
考点一：can，may，must 等情态动词在陈述句中的用法：
1. can 的用法：
（1）表示能力、许可、可能性。 表示能力时一般译为“能、会”， 即有种能力，尤其是生来具备的能力，此时may 和must均不可代替它。
如：She can swim fast, but I can’t. 她能游得很快，但我不能。
I can see with my eyes. 我用眼睛看。
（2）表示许可，常在口语中。
如：You can use my dictionary. 你可以用我的字典。
（3） 表示推测，意为“可能”， 常用于否定句和疑问句中， 此时can’t 译为“ 不可能”。
如：Can the news be true 这个消息会是真的吗？
—Can it be our teacher 那个人有可能是我们老师吗？
—No, it can’t be our teacher. He is on a visit to the Great Wall.
不可能。咱们老师正在游览长城呢。
2. could的用法：
（1）can的过去式，意为“ 能、 会”，表示过去的能力。
如：He could write poems when he was 10. 他十岁时就会写诗。
（2）could在疑问句中，表示委婉的语气，此时 could 没有过去式的意思。
如: Could you do me a favor 你能帮我个忙吗？
—Could I use your pen 我能用一下你的钢笔吗
—Yes, you can.可以。（注意回答）
3. may的用法：
（1）表示请求、许可，比can 正式.
如：May I borrow your bike 我可以借你的自行车吗？
You may go home now. 现在你可以回家了。
(2) 表示推测，谈论可能性，意为“ 可能， 或许”，一般用于肯定句中。
如：It may rain tomorrow. 明天可能会下雨。
She may be at home. 她可能在家呢.
(3) may的过去式为might ，表示推测时。可能性低于may。
如：He is away from school. He might be sick.他离开学校了，可能是他生病了。
(4) 表示希望、祈求、祝愿，常可译为“祝愿”。通常是用may +主+V
如：May you have a good time 祝你过得愉快。
May you be happy! 祝你幸福！
May you succeed！祝你成功！
4. must的用法：
(1) must 表示主观看法，意为“必须、一定”。
如：You must stay here until I come back.在我回来之前你必须呆在这儿。
Must I hand in my homework right now 我必须现在交作业吗？
(2) 其否定形式mustn’t表示“ 一定不要 ” “千万别” “禁止, 不许”.
如：You mustn’t play with fire. 你不许玩火。
You mustn’t be late. 你一定不要迟到。
（3）对must引导的疑问句，肯定回答为must，否定回答为needn’t 或 don’t have to . 如：—Must I finish my homework 我现在必须完成作业吗？
—No, you needn’t.不，你不必。
(4) must表示有把握的推测，用于肯定句。
如: The light is on, so he must be at home now.灯亮着，他现在肯定在家。
5. need的用法：
（1）need 表示需要、必须，主要用于否定句和疑问句中，其否定形式为needn’t，意为“没有必要，不必”。 用need 提问时，肯定回答为 must，否定回答为 needn’t或don’t have to。
如：—Need I stay here any longer 我还有必要留在这儿吗？
—Yes, you must .是的。
—No. you needn’t /don’t have to. 不， 你不必。
(2) need 还可以作实义动词，此时有人称、数和时态的变化，如果是人作主语后边多接动词不定式。
如：I need to do it right now. 我需要马上做这件事。
He needs to learn more about the girl.他需要多了解那个女孩。
如果是物作主语，一般用need doing 与 need to be done这种情况下应注意两点：
主动形式的动名词doing具有被动的含义；
该动名词可以改为其动词不定式的被动形式而句子的意义不变。
例如：The door needs painting. = The door needs to be painted.
那扇门需要油漆一下。
Your car needs mending. = Your car needs to be repaired.
你的车需要维修了。
考点二: 情态动词表示推测的用法:
一、“情态动词+动词原形”表示对现在的推测。
1、can表示推测时一般用于否定句或疑问句。
如：That man can’t be her husband she is still single.
Who is knocking at the door Can it be the postman
2、must表示肯定的推测，一般用于肯定句中。
如：He must be in his office now. Mr. Li must be working now, for the lights in his office are still on.
3、might 表示推测时不一定是may的过去时，只是表示其可能性较小。
如：The man may be the headmaster.
—Where is Mr. Li —He might be working in his office.
—May Mr. Li come —He might not come here.
4、Could表示推测时，语气can比要弱，说话者留有余地。
如：—Could it be an animal —It could not be, because it is not moving.
5、Should表示推测的可能性比较大，仅比must的可能性 小一点。
如：It is already 10 o’clock now they should be there.
考点三：对不同时态的推测的表示方法
对……的推测 表示方法 例句
现在的事情 情态动词+动词原形 Something must be wrong with the TV set.
正在发生的事情 情态动词+be+v-ing形式 She could be running for exercise.
过去的事情 情态动词+have+v-ed形式 You must have left it somewhere in the library.
【总结规律】：
1)“_____________+_____________”表示对现在的事情的推测。
eg：That man can’t be her husband.那个男人不可能是她的老公。
Something must be wrong with the TV set. 电视机一定是出了毛病。
2)“____________+be+____________”表示对正在发生的事情的推测。
eg: She could be running for exercise. 她可能正在跑步健身。
She may be doing her homework now. 她可能正在写家庭作业。
3)“____________+have+___________”表示对过去的事情的推测。
eg: You must have left your book in the library. 你一定是把书丢在图书馆了。
It must have rained last night. 昨天晚上一定下雨了。
【小试牛刀】：根据汉语意思完成句子，每空一词。
She _______ ________ _______what she wanted.她一定已经知道他想要什么。
Four hundred dollars for a pair of shoes, you ________ ________ ________ !
一双鞋子$400，你一定是在开玩笑吧！
She ________ ________ _________for you. 她不可能正在等你。
He likes reading. Now he ________ ________ ________ in the library.
他喜欢读书。现在一定正在图书馆读书呢。
Her watch ________ __________ __________. I will go and call her.
她的表一定是停了，我去叫她。
探究三： 完成4a－4c的任务
效果及问题预设
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