(共28张PPT)
人教新目标版 九年级(全)
Unit 8 It must belong to Carla.
Period 3 SectionA
Grammar focus-4c
语法课优质课
Presentation
Learning aims
1.学习本课新词汇:laboratory, coat, sleepy, pocket
掌握句型：—Whose volleyball is this
—It must/might/could/can’t be Carla’s.
—It must/might/could/can’t belong to Carla.
2. 运用本单元所学习的must，could，might，can情态动词，表达对事物的推测。同时灵活运用不同的情态动词进行推测，进一步提高口语表达的准确性。
Whose…is this
It \must\might\could\can’t be…
Presentation
Revision
Pre-grammar
Look and say.
Can you guess what the picture shows
It must be ______________.
It also could\might be ______________.
a young girl
an old woman
It could be _____________.
It also might be _________.
a white vase
two faces
Presentation
Revision
Pre-grammar
Look and say.
Can you guess what it is
It could be _______________.
It also might be ______________
______________.
a beautiful girl
a musician playing
the saxophone
It must be _______.
It also might\could be ______________.
a cat
a bear\dog
Presentation
New words
Pre-grammar
Listen and repeat.
laboratory [l b r t( )ri]
n.实验室
outdoors
[ a t d (r)z]
adv.在户外；
在野外
coat [k t]
cn.外套；
外衣
sleepy [ sli pi]
adj.困倦的；
瞌睡的
Presentation
Grammar Focus
While-Grammar
Read the sentences and translate them.
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.
Presentation
Practice
While-Grammar
Fill in the blanks according to grammar focus.
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.
Whose volleyball
must Carla’s
Whose hair band
could
might
both
What
not sure
can’t be
might be
Presentation
Grammar Focus
While-Grammar
探究语法规律
What did you find out
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.
探究一：情态动词表示推测的用法
1.概念： 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can, could , may, might, must, can’t都可以用来表示说话人对某事的推测。
2.结构：情态动词+动词原形。
Presentation
探究一：情态动词表示推测的用法
Grammar Focus
While-Grammar
探究语法规律
1. must表示说话人对事物的推测可能性的程度非常大，意为“一定；准是”，表示肯定推测，只能用于肯定句。如果要表示“一定不”，应该用can’t。如果询问可能性时，应该用can。
He must know the answer. 他肯定知道答案。
mustn’t 在英语中不能用于表示推测，但可以表示“禁止，不允许”之意。
2. may, might 表示推测把握性不大的推测，意思是“可能，也许”。might不表示过去时态，语气更委婉，可能性更小。may, might表推测时，可用于否定句，但不用于疑问句。
The mobile phone could\may\might belong to Lucy or Lily. They both
have mobile phones.
He may / might not be at home, but I'm not sure.
他可能不在家，不过我也不确定。
Presentation
探究一：情态动词表示推测的用法
Grammar Focus
While-Grammar
探究语法规律
3. can表示推测“可能性”时，一般用于否定句或疑问句。can’t意为“不可能”， 用于否定句。can 在疑问句中意思是“会，可能” 。
He can’t pick her schoolbag up. 他不可能拿了她的书包。
Can he know the answer 他可能知道答案吗？
could 表示某事有可能发生或可能是事实。
Don’t eat it. It could go bad. 不要吃它，可能坏了。
Don’t eat it. It could go bad. 不要吃它，它可能坏了。
The plane could be put off by the storm.
这趟飞机可能会因为暴风雨而推迟。
could可用于表示客气、礼貌、委婉的请求语气。
e.g. Could you please help me with my homework
你能帮我完成我的家庭作业吗？
Presentation
Grammar Focus
While-Grammar
探究语法规律
探究一：情态动词表示推测的用法
4. must表示可能性最大的肯定推测，意思是“一定、准是”。只能用于肯定句。 can’t表示可能性最大的否定推测，意思是“不可能；一定不”。
He must know the answer. 他肯定知道答案。
He can’t know the answer. 他肯定不知道答案
注意：
（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。
Presentation
Grammar Focus
While-Grammar
探究语法规律
探究一：情态动词表示推测的用法
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 表示不太有把握的否定推测。
疑问句 can/ could 可能 表示推测。
Presentation
Grammar Focus
While-Grammar
探究语法规律
探究二：情态动词表示推测的几种情况
1. 情态动词+ do 此结构表示对现在或将来情况的推测和判断
—Do you know where she is now
—I think she ______ ________in Beijing. 我认为她可能在北京旅游。
might travel
You must be hungry after a long walk.
2. 情态动词+ be doing 此结构表示对现在或将来正在进行的情况的推测和判断。
At this moment, my father can’t be working in the office.
He ______ ______ ______ his homework at home.他一定在家做作业。
must be doing
They must be waiting for us. Let’s hurry up.
他一定在家做作业。
He ______ ______ ______ his homework at home.
must be doing
他们一定不在图书馆读书。They______ ______ reading in the library.
can’t be
Presentation
Grammar Focus
While-Grammar
探究语法规律
3. 情态动词+ have done 此结构表示对过去情况的推测和判断。
The road is wet. It ____________ _____ _____last night.昨天晚上可能下雨了。
探究二：情态动词表示推测的几种情况
might\could have rained
他可能已完成了工作。He ____________ ______ ________ the work.
could/might have finished
The road is wet. It must have rained last night.
He can’t have gone to Shanghai because I saw him just now.
他不可能去了上海，我刚看见他了。
4. 情态动词+ have been doing此结构表示对过去正在进行的情况的推测和判断。
Your mother must have been looking for you at that moment.
These people may/might have seen the film before.
(过去) 这些人以前可能看过这部电影。
5. must/could/might/can’t be done sth. 表示被动语态的推测。
e.g.我的书包不可能被偷。My schoolbag ______ ______ ______.
can’t be stolen
Presentation
Grammar Focus
While-Grammar
探究语法规律
What did you find out
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.
探究三：belong (to)的用法
belong用作动词，通常用作不及物动词。基本含义是“在原来该有的地方”,一般译为“属于”,“与…有关”。不可直接接宾语,常和介词to连用,指(主权方面的)“属于”,也指“是(社团、家族、社会阶层的)一员”。
Presentation
Grammar Focus
While-Grammar
探究语法规律
探究三：belong (to)的用法
1 belong to sb. 可用来指某物属于某人 , to是介词，后跟名词，代词等。
例: This book belongs to me.这本书是我的。
2 belong to sth.
A）指与某物或某处有一定的关联，或者什么东西可以做什么用。例如：
I belong to Shanghai. 我是上海人。This lid belongs to this jar. 这个盖子是配这个瓶子的。
B）指XX是某团体、组织等中的一员。例如：Do you belong to any clubs 你属于哪一个俱乐部吗？（也可译为“你参加了哪一个俱乐部了吗？”）
在用法1中，说“sth. belong to sb.”也可以用“sth. +be +名词性物主代词或者人名’s的形式”。
Whose T-shirt is this
It must belong to Mary.
=It must be Mary’s.
The book belongs to her.
=The book is hers.
Presentation
Practice
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.
Choose the best way to complete each sentence using the words in the brackets.
4a
might be
must be
could be
can’t be
must be
Post-Grammar
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_________________________.
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 _______________________________.
4b
be interesting
cold
must be delicious
/be that boring
/having a cold
Practice
Post-Grammar
ill
/sick
Presentation
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
Practice
Post-Grammar
Presentation
Practice
Post-Grammar
I can see a girl in the picture. I think it must be a girl’s room.
I guess not. But it might be a boy’s room because in general boys like CD more than girl.
It could/might/can’t
be... because ...
I guess so/I don’t think
so. But it might/could/must
be ...because …
Ask and answer in pairs.
Presentation
Practice
Post-Grammar
Look at the two rooms below. Make guesses about the owner of each room.
Presentation
Summary
情态动词表推测
主要有must, can /could, may /might等。
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。
Post-Grammar
Presentation
Class test
Post-Grammar
一、用情态动词的正确形式填空
After a long walk, you ______ feel tired.
The man ______ be Mr. Li. He went to HK yesterday.
My mom go the visit grandpa. I am not sure of it.
The note book ______ be Mary’s because it has her name on it.
5.You _______ swim in the river. It’s dangerous.
must
can’t
may/might/ could
must
mustn’t
Presentation
Class test
Post-Grammar
1. 和克莱尔一起工作塔拉总是感到不安。
Tara always _____ ______ about working with Claire.
2. 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.
3. 刚才萨莉没有和我们说再见就走开了。
Sally _____ _____ without saying goodbye to us just now.
4. 当你在地板上走路时试着不要发出噪音。
Try not to _____ _____ when you walk on the floor.
5. 我的隔壁邻居总是开派对到半夜。
My ________ ________ always holds parties till midnight.
6. 昨天下午这些孩子高兴地踢足球。
These children _____ _____ ______ football yesterday afternoon.
feels uneasy
taking a shower
went away
二、根据汉语意思完成英语句子，每空一词。
make noises
next-door neighbor
had fun playing
Presentation
Homework
Recite the sentences in Grammar Focus and remember the Grammar.
2. Write a passage according to the instruction.
假设今天是星期天，你正在家里午睡，突然听到敲门声，请你根据表格中的信息，写一篇短文来判断是谁，并给出判断理由。
要求：1.短文流畅、连贯；2.60~80词。开头已给出，不计入总词数。
There is a loud knock at the door. The knock wakes me up. Who is it It can’t be my father or mother, because they are both staying at home. It can’t be a thief. The thief is afraid，and it’s impossible for him to knock at the door. It may be my neighbor. Maybe he wants some help. Oh, it must be my aunt. She often comes to visit us on Sunday.
三.根据汉语意思完成句子。
1.那件蓝色的外套一定是李颖的。
That blue _____ ______ ________ _____ Li Ying.
2.现在他或许已经离开了，刚才他说要离开的。
He ______ _____ ______ now. He said he would leave just now.
3.那栋房子不可能是布莱克先生的，他没有足够的钱买它。
The house _____ ____ Mr. Black’s. He doesn’t have enough money to buy it.
4.琳达一定在家，她说她会在家等我。
Linda _____ _____ at home. She said she would wait for
me at home.
coat must belong to
might have left
can’t be
must be
Practice
https://www.21cnjy.com/help/help_extract.php
